Annual report pursuant to Section 13 and 15(d)

Note 14 - Stockholders' Equity (Details Textual)

Note 14 - Stockholders' Equity (Details Textual)		1 Months Ended														12 Months Ended
Note 14 - Stockholders' Equity (Details Textual)	Feb. 15, 2021 shares	Dec. 31, 2022 USD ($) $ / shares shares	Oct. 31, 2022 USD ($) shares	Aug. 31, 2022 USD ($) shares	Jul. 31, 2022 USD ($) shares	Jun. 30, 2022 USD ($) shares	May 31, 2022 USD ($) shares	Apr. 30, 2022 USD ($) shares	Feb. 28, 2022 USD ($) shares	Jan. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) $ / shares shares	Oct. 31, 2021 USD ($) shares	Sep. 30, 2021 USD ($) shares	May 31, 2021 USD ($) shares	Feb. 28, 2021 USD ($) shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2019 shares	Dec. 31, 2017 shares
Common Stock, Shares Authorized (in shares)		200,000,000									200,000,000					200,000,000	200,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) \| $ / shares		$ 0.001									$ 0.001					$ 0.001	$ 0.001
Stock Issued During Period, Value, Warrant Exercised \| $																	$ 0
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares		1.90														$ 1.90
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)																(0)	347,901
Proceeds from Issuance of Common Stock \| $																$ 6,519,000	$ 10,166,000
Class of Warrant or Right, Weighted Average Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares		$ 1.90														$ 1.90
Stock Options and Restricted Stock Units [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total \| $		$ 4.5														$ 4.5
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)																2 years 3 months 18 days
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			28,223	10,537	143,708	12,121	182,293	9,615	47,933	44,780	1,652,517	4,673	12,111	81,883	25,000	3,691,202	1,803,172
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value \| $			$ 21,308	$ 10,000	$ 120,000	$ 10,000	$ 175,000	$ 10,000	$ 50,000	$ 50,000	$ 2,420,000	$ 10,000	$ 25,000	$ 235,000	$ 151,500
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, Number of Installments											6	6	6	12
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						3 years	12 months	3 years	3 years	3 years	3 years	3 years	3 years	1 year
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested \| $																$ 2,400,000	$ 6,900,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding \| $		$ 8,000,000									$ 6,500,000					$ 8,000,000	$ 6,500,000
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		27,739
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value \| $		$ 20,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, Number of Installments		3
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		3 years
Restricted Stock Units (RSUs) [Member] \| Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		3,184,253
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value \| $		$ 2,368,682
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, Number of Installments																6
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)																3 years
The 2014 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)																			2,113,637
The 2014 Stock Incentive Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)																			10 years
The 2019 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)																		18,500,000
The 2019 Stock Incentive Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)																		10 years
LiNiCo [Member]
Stock Issued During Period, Shares, Equity Method Invesment (in shares)	375,000																375,000
First Cashless Exercise of Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)											10,350						10,350
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares											$ 1.90						$ 1.90
Second Cashless Exercise of Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)											86,778						86,778
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares											$ 1.90						$ 1.90
First Set of Common Stock Pursuant to Cashless Exercise of Warrant [Member]
Share Price (in dollars per share) \| $ / shares											3.95						$ 3.95
Stock Issued During Period, Value, Warrant Exercised \| $																	$ 5,371
Second Set of Common Stock Pursuant to Cashless Exercise of Warrant [Member]
Share Price (in dollars per share) \| $ / shares											$ 6.20						$ 6.20
Stock Issued During Period, Value, Warrant Exercised \| $																	$ 60,219
Management and Employees [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)																2,150,467	2,005,258
Board Members [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)																125,264	109,138
Prior Company Executive [Member]
Stock Issued During Period, Shares, New Issues (in shares)																	57,170
ATM [Member]
Stock Issued During Period, Shares, New Issues (in shares)																6,742,069,000,000	2,995,430
Proceeds from Issuance of Common Stock \| $																$ 6,500,000	$ 10,200,000
Director [Member]
Stock Issued During Period, Shares, Issued for Services (in shares)																28,223
Former Board Member [Member]
Stock Issued During Period, Shares, Issued for Services (in shares)																19,176