Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details Narrative)

Stockholders' Equity (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended			3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 24, 2018	Jun. 18, 2018	May 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	May 31, 2016
Number of shares issued related public offering		10,085,500
Sale of stock issued price per share		$ 2.85
Gross proceeds from public offering		$ 28,700
Net proceeds from public offering		$ 26,600
Proceeds from issuance of stock									$ 28,754	$ 11,556
Incremental fair value from modification									$ 402
Expected years						3 years 6 months		3 years 6 months
Dividend yield						0.00%		0.00%	0.00%	0.00%
General and administrative expense						$ 2,174		$ 1,925	$ 7,862	$ 4,897
Stock option exercises
Expense related to the modification of stock option awards									$ 15
Award vesting rights description									The options vest in 1/36th increments during each of the first twelve months following the date of grant and thereafter the options vest in one-third increments on the second and third anniversary of the date of grant.
Options One [Member]
Options to purchase shares of common stock									420,000
Options exercisable term									5 years
Options exercise price						$ 3.00			$ 3.00
Options Two [Member]
Options to purchase shares of common stock									210,000
Options exercisable term									5 years
Options exercise price						5.00			$ 5.00
Options Three [Member]
Options to purchase shares of common stock									210,000
Options exercisable term									5 years
Options exercise price						$ 7.00			$ 7.00
Maximum [Member]
Expected years									3 years 6 months	3 years 6 months
Expected stock volatility						79.30%		71.40%	86.30%	72.70%
Warrants [Member]
Fair value assumptions stock option price per share	$ 3.26
Expected years	2 years
Expected stock volatility	80.20%
Discount rate	2.56%
Dividend yield	0.00%
General and administrative expense							$ 400				$ 600
Accrued liabilities							600
Offset to additional paid-in capital							$ 1,000
Interstate Battery Systems International, Inc. [Member]
Warrants to purchase shares of common stock												702,247
Pre-modification exercise price of the warrants												$ 7.12
Post-modification exercise price of the warrants												$ 3.33
Interstate Battery Systems International, Inc. [Member] \| Series of Agreements [Member]
Warrants to purchase shares of common stock	702,247
Pre-modification exercise price of the warrants	$ 7.12
Post-modification exercise price of the warrants	$ 3.33
Pre-modification warrant expiration date	Jun. 24, 2018
Post-modification warrant expiration date	Jun. 23, 2020
Incremental fair value from modification	$ 1,000
Stephen Cotton [Member] \| Maximum [Member]
Options to purchase shares of common stock			840,000
Officers and Directors Purchase Plan [Member]
Number of shares issued									2,034
Proceeds from issuance of stock									$ 4
Restricted Stock Units (RSUs) [Member]
Number of shares issued									65,600
Restricted Stock Units (RSUs) [Member] \| Chief Financial Officer [Member]
Restricted stock shares granted				150,000
Restricted stock shares granted, value				$ 339
Over-Allotment Option [Member]
Number of shares issued related public offering					1,072,500
Net proceeds from public offering					$ 2,100