UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Public Offering	At-the-Market Offering	PREFERRED STOCK	COMMON STOCK	COMMON STOCK Public Offering	COMMON STOCK At-the-Market Offering	ADDITIONAL PAID-IN CAPITAL	ADDITIONAL PAID-IN CAPITAL Public Offering	ADDITIONAL PAID-IN CAPITAL At-the-Market Offering	ACCUMULATED DEFICIT	ACCUMULATED OTHER COMPREHENSIVE INCOME
Beginning balance (in shares) at Dec. 31, 2020					8,506,651
Beginning balance at Dec. 31, 2020	$ 34,170				$ 1			$ 371,518			$ (337,406)	$ 57
Increase (Decrease) in Shareholders' Equity
Net Loss	(7,752)										(7,752)
Unrealized Loss on Available-for-Sale Investments	(7)											(7)
Foreign Currency Translation Adjustments	3											3
Stock-based Compensation expense (in shares)					2,396
Stock-based Compensation and modification expense	(236)							(236)
Ending balance (in shares) at Mar. 31, 2021					8,509,047
Ending balance at Mar. 31, 2021	26,178				$ 1			371,282			(345,158)	53
Beginning balance (in shares) at Dec. 31, 2020					8,506,651
Beginning balance at Dec. 31, 2020	34,170				$ 1			371,518			(337,406)	57
Increase (Decrease) in Shareholders' Equity
Net Loss	(16,152)
Unrealized Loss on Available-for-Sale Investments	(8)
Foreign Currency Translation Adjustments	3
Ending balance (in shares) at Jun. 30, 2021					8,528,307
Ending balance at Jun. 30, 2021	18,203				$ 1			371,708			(353,558)	52
Beginning balance (in shares) at Mar. 31, 2021					8,509,047
Beginning balance at Mar. 31, 2021	26,178				$ 1			371,282			(345,158)	53
Increase (Decrease) in Shareholders' Equity
Net Loss	(8,400)										(8,400)
Unrealized Loss on Available-for-Sale Investments	(1)											(1)
Foreign Currency Translation Adjustments	0
Stock-based Compensation and modification expense	433							433
Vesting of Restricted Stock Units Issued, net of taxes withheld (in shares)					19,260
Vesting of Restricted Stock Units Issued, net of taxes withheld	(7)							(7)
Ending balance (in shares) at Jun. 30, 2021					8,528,307
Ending balance at Jun. 30, 2021	$ 18,203				$ 1			371,708			(353,558)	52
Beginning balance (in shares) at Dec. 31, 2021	0			0
Beginning balance (in shares) at Dec. 31, 2021	8,544,225				8,544,225
Beginning balance at Dec. 31, 2021	$ 2,535				$ 1			372,562			(370,080)	52
Increase (Decrease) in Shareholders' Equity
Net Loss	(7,162)										(7,162)
Foreign Currency Translation Adjustments	(1)											(1)
Stock-based Compensation and modification expense	(179)							(179)
Ending balance (in shares) at Mar. 31, 2022				0
Ending balance (in shares) at Mar. 31, 2022					8,544,225
Ending balance at Mar. 31, 2022	$ (4,807)				$ 1			372,383			(377,242)	51
Beginning balance (in shares) at Dec. 31, 2021	0			0
Beginning balance (in shares) at Dec. 31, 2021	8,544,225				8,544,225
Beginning balance at Dec. 31, 2021	$ 2,535				$ 1			372,562			(370,080)	52
Increase (Decrease) in Shareholders' Equity
Net Loss	(12,128)
Unrealized Loss on Available-for-Sale Investments	0
Foreign Currency Translation Adjustments	$ (3)
Ending balance (in shares) at Jun. 30, 2022	15,000			15,000
Ending balance (in shares) at Jun. 30, 2022	9,407,296				9,407,296
Ending balance at Jun. 30, 2022	$ 20,145				$ 1			402,304			(382,209)	49
Beginning balance (in shares) at Mar. 31, 2022				0
Beginning balance (in shares) at Mar. 31, 2022					8,544,225
Beginning balance at Mar. 31, 2022	(4,807)				$ 1			372,383			(377,242)	51
Increase (Decrease) in Shareholders' Equity
Net Loss	(4,967)										(4,967)
Unrealized Loss on Available-for-Sale Investments	0
Foreign Currency Translation Adjustments	(2)											(2)
Issuance of stock, net of offering costs (in shares)				15,000		844,613	7,500
Issuance of stock, net of offering costs (in dollars)	14,916	$ 14,893	$ 15					14,916	$ 14,893	$ 15
Stock-based Compensation and modification expense	$ 97							97
Vesting of Restricted Stock Units Issued, net of taxes withheld (in shares)					10,958
Ending balance (in shares) at Jun. 30, 2022	15,000			15,000
Ending balance (in shares) at Jun. 30, 2022	9,407,296				9,407,296
Ending balance at Jun. 30, 2022	$ 20,145				$ 1			$ 402,304			$ (382,209)	$ 49