Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($)	At Market Issuance Sales Agreement [Member] Common Stock [Member]	At Market Issuance Sales Agreement [Member] Preferred Stock [Member]	At Market Issuance Sales Agreement [Member] Additional Paid-in Capital [Member]	At Market Issuance Sales Agreement [Member] Retained Earnings [Member]	At Market Issuance Sales Agreement [Member]	Direct Offering [Member] Common Stock [Member]	Direct Offering [Member] Preferred Stock [Member]	Direct Offering [Member] Additional Paid-in Capital [Member]	Direct Offering [Member] Retained Earnings [Member]	Direct Offering [Member]	Lenders [Member] Common Stock [Member]	Lenders [Member] Preferred Stock [Member]	Lenders [Member] Additional Paid-in Capital [Member]	Lenders [Member] Retained Earnings [Member]	Lenders [Member]	Common Stock [Member]	Preferred Stock [Member] Series A Preferred Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares)																36,902,361		7,531
Balance (in shares) at Dec. 31, 2020																36,902,361		7,531
Balance at Dec. 31, 2020																$ 368,000		$ 1,000	$ 513,744,000	$ (539,414,000)	$ (25,301,000)
Stock-based compensation expense (in shares)																72,229		0
Stock-based compensation expense																$ 1,000		$ 0	147,000	0	148,000
Issuance of shares pursuant to direct offerings (in shares)	1,368,362	0
Issuance of shares pursuant to direct offerings	$ 13,000	$ 0	$ 14,853,000	$ 0	$ 14,866,000
Net loss and comprehensive loss																0		0	0	(5,944,000)	(5,944,000)
Reclassification of warrant liability																$ 0		$ 0	3,179,000	0	3,179,000
Balance (in shares) at Mar. 31, 2021																38,342,952		7,531
Balance at Mar. 31, 2021																$ 382,000		$ 1,000	531,923,000	(545,358,000)	(13,052,000)
Balance (in shares) at Dec. 31, 2020																36,902,361		7,531
Balance at Dec. 31, 2020																$ 368,000		$ 1,000	513,744,000	(539,414,000)	(25,301,000)
Net loss and comprehensive loss																					(17,506,000)
Balance (in shares) at Jun. 30, 2021																40,618,400		6,281
Balance at Jun. 30, 2021																$ 405,000		$ 1,000	551,449,000	(556,920,000)	(5,065.000)
Balance (in shares)																38,342,952		7,531
Balance (in shares) at Mar. 31, 2021																38,342,952		7,531
Balance at Mar. 31, 2021																$ 382,000		$ 1,000	531,923,000	(545,358,000)	(13,052,000)
Stock-based compensation expense (in shares)																6,812		0
Stock-based compensation expense																$ 0		$ 0	3,293,000	0	3,293,000
Issuance of shares pursuant to direct offerings (in shares)	115,956	0				1,219,512	0
Issuance of shares pursuant to direct offerings	$ 1,000	$ 0	$ 1,412,000	$ 0	$ 1,413,000	$ 12,000	$ 0	$ 14,062,000	$ 0	$ 14,074,000
Net loss and comprehensive loss																$ 0		$ 0	0	(11,562,000)	(11,562,000)
Issuance of shares pursuant to exercise of warrants (in shares)																362,500		0
Issuance of shares pursuant to exercise of warrants																$ 4,000		$ 0	0	0	4,000
Conversion of preferred shares to common shares (in shares)																506,312		(1,250)
Conversion of preferred shares to common shares																$ 5,000		$ 0	(5,000)	0	0
Issuance of shares to lenders (in shares)											64,356	0
Issuance of shares to lenders											$ 1,000	$ 0	$ 764,000	$ 0	$ 765,000
Balance (in shares) at Jun. 30, 2021																40,618,400		6,281
Balance at Jun. 30, 2021																$ 405,000		$ 1,000	551,449,000	(556,920,000)	(5,065.000)
Balance (in shares)																40,618,400		6,281
Balance (in shares)																43,656,169	2,300	329
Balance (in shares) at Dec. 31, 2021																43,656,169	2,300	329
Balance at Dec. 31, 2021																$ 435,000	$ 1,000	$ 1,000	613,572,000	(573,400,000)	40,609,000
Stock-based compensation expense (in shares)																236,995	0	0
Stock-based compensation expense																$ 2,000	$ 0	$ 0	431,000	0	433,000
Issuance of shares pursuant to direct offerings (in shares)																6,857,140	0	0
Issuance of shares pursuant to direct offerings																$ 69,000	$ 0	$ 0	11,672,000	0	11,741,000
Dividends paid and declared																0	0	0	0	(1,265,000)	(1,265,000)
Net loss and comprehensive loss																$ 0	$ 0	$ 0	0	(5,912,000)	(5,912,000)
Balance (in shares) at Mar. 31, 2022																50,750,304	2,300	329
Balance at Mar. 31, 2022																$ 506,000	$ 1,000	$ 1,000	625,675,000	(580,577,000)	45,606,000
Balance (in shares) at Dec. 31, 2021																43,656,169	2,300	329
Balance at Dec. 31, 2021																$ 435,000	$ 1,000	$ 1,000	613,572,000	(573,400,000)	40,609,000
Net loss and comprehensive loss																					(11,395,000)
Balance (in shares) at Jun. 30, 2022																50,770,275	2,300	329
Balance at Jun. 30, 2022																$ 506,000	$ 1,000	$ 1,000	626,098,000	(587,348,000)	39,258,000
Balance (in shares)																50,750,304	2,300	329
Balance (in shares) at Mar. 31, 2022																50,750,304	2,300	329
Balance at Mar. 31, 2022																$ 506,000	$ 1,000	$ 1,000	625,675,000	(580,577,000)	45,606,000
Stock-based compensation expense (in shares)																19,971	0	0
Stock-based compensation expense																$ 0	$ 0	$ 0	423,000	0	423,000
Dividends paid and declared																0	0	0	0	(1,288,000)	(1,288,000)
Net loss and comprehensive loss																$ 0	$ 0	$ 0	0	(5,483,000)	(5,483,000)
Balance (in shares) at Jun. 30, 2022																50,770,275	2,300	329
Balance at Jun. 30, 2022																$ 506,000	$ 1,000	$ 1,000	$ 626,098,000	$ (587,348,000)	$ 39,258,000
Balance (in shares)																50,770,275	2,300	329