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Related Party Transactions (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended
	Jun. 30, 2021	Jul. 31, 2021	Feb. 04, 2021	Mar. 31, 2021	Apr. 14, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 11, 2021	Jun. 30, 2020	Dec. 31, 2016	Dec. 31, 2014
Related Party Transaction [Line Items]
Common stock, shares issued						29,802,000	29,716,000
Common stock, par value						$ 0.001	$ 0.001
Proceeds from issuance of common stock				$ 4,892
Private Placement [Member]
Related Party Transaction [Line Items]
Common stock, par value											$ 0.001
Proceeds from issuance of common stock	$ 8,400
Chairman, Robert W. Duggan [Member] \| Private Placement [Member]
Related Party Transaction [Line Items]
Common stock, shares issued	3,048,780
Common stock, par value	$ 0.001
Price per share	$ 16.40
Aggregate issuance costs	$ 41,000
Net proceeds	$ 50,000
Proceeds from issuance of common stock		$ 8,400
MDB Capital Group, LLC [Member] \| Initial Public Offering [Member]
Related Party Transaction [Line Items]
Price per share										$ 5.00
Warrants/rights outstanding						0
MDB Capital Group, LLC [Member] \| Private Placement [Member]
Related Party Transaction [Line Items]
Price per share											$ 2.67
Robert W. Duggan [Member]
Related Party Transaction [Line Items]
Due to related parties								$ 41,000
Robert W. Duggan [Member] \| Private Placement [Member]
Related Party Transaction [Line Items]
Price per share	$ 16.40
Subsequent Event [Member]
Related Party Transaction [Line Items]
Common stock, par value					$ 0.001
Rights Offering [Member]
Related Party Transaction [Line Items]
Price per share									$ 7.01
Net proceeds			$ 4,500
Warrants/rights outstanding						0
Rights Offering [Member] \| Common Stock [Member]
Related Party Transaction [Line Items]
Warrants/rights outstanding									641,571