Annual report pursuant to Section 13 and 15(d)

Cover
- Document And Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Note 14 - Commitments and Contingencies (Details Textual)

v3.20.4

Note 14 - Commitments and Contingencies (Details Textual)				1 Months Ended	12 Months Ended
	Feb. 04, 2019 USD ($)	Dec. 03, 2018 USD ($)	Apr. 19, 2018 USD ($)	Jun. 30, 2019 USD ($) shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Feb. 20, 2019 USD ($)	Jul. 31, 2018 a	Jun. 24, 2018 USD ($)	Feb. 07, 2017 USD ($)	Aug. 07, 2015 a
Land Subject to Ground Leases (Acre) \| a								14,016			21,697
Payments for Rent	$ 1,500,000
Operating Leases, Rent Expense, Net, Total					$ 600,000	$ 600,000
One-time Fee Payable							$ 500,000		$ 500,000
Stephen Clark [Member]
Severance Costs			$ 900,000
Severance Costs, Period of Consideration (Year)			2 years
Stock or Unit Option Plan Expense			$ 15,000
Stephen Clark [Member] \| Minimum [Member]
Stock Options, Exercise Period (Day)			90 days
Stephen Clark [Member] \| Maximum [Member]
Stock Options, Exercise Period (Day)			2 years
Selwyn Mould [Member]
Severance Costs		$ 900,000
Severance Costs, Period of Consideration (Year)		2 years
Stock Options, Exercise Period (Day)		2 years
Cash Severance Payment		$ 100,000
Cash Severance Payment, Number of Installments		6
Severance Payment, Restricted Stock Units, Period Of Award (Month)		21 months
Severance Payment, Restricted Stock Units, Monthly Value of Common Share Conversion		$ 33,333
Severance Payment, Restricted Stock Units, Weighted Average Stock Price, Trading Days (Day)		20 days
Severance Payment, Restricted Stock Units, Cash Payment in Lieu of Common Shares		$ 33,333
Interstate Battery [Member] \| Interstate Battery Agreement [Member]
Other Commitment, Total									$ 2,000,000.0
Clarios [Member] \| Clarios Agreement [Member]
Other Commitment, Total										$ 1,000,000.0
Payments for Key-man Penalties				$ 2,000,000.0
Stock Issued During Period, Shares, Key-man Pentaly (in shares) \| shares				807,436

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Area of land subject to a ground lease.

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