Consolidated Statements of Shareholders' Deficit (Unaudited) - USD ($) $ in Thousands	Conversion of Series A Preferred to Common Stock [Member] Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Conversion of Series A Preferred to Common Stock [Member] Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Conversion of Series A Preferred to Common Stock [Member] Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Conversion of Series A Preferred to Common Stock [Member] Common Stock [Member]	Conversion of Series A Preferred to Common Stock [Member] Treasury Stock [Member]	Conversion of Series A Preferred to Common Stock [Member] Additional Paid-in Capital [Member]	Conversion of Series A Preferred to Common Stock [Member] AOCI Attributable to Parent [Member]	Conversion of Series A Preferred to Common Stock [Member] Retained Earnings [Member]	Conversion of Series A Preferred to Common Stock [Member]	Conversion of Series A-1 Preferred to Common Stock [Member] Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Conversion of Series A-1 Preferred to Common Stock [Member] Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Conversion of Series A-1 Preferred to Common Stock [Member] Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Conversion of Series A-1 Preferred to Common Stock [Member] Common Stock [Member]	Conversion of Series A-1 Preferred to Common Stock [Member] Treasury Stock [Member]	Conversion of Series A-1 Preferred to Common Stock [Member] Additional Paid-in Capital [Member]	Conversion of Series A-1 Preferred to Common Stock [Member] AOCI Attributable to Parent [Member]	Conversion of Series A-1 Preferred to Common Stock [Member] Retained Earnings [Member]	Conversion of Series A-1 Preferred to Common Stock [Member]	Conversion of Series D Preferred to Common Stock [Member] Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Conversion of Series D Preferred to Common Stock [Member] Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Conversion of Series D Preferred to Common Stock [Member] Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Conversion of Series D Preferred to Common Stock [Member] Common Stock [Member]	Conversion of Series D Preferred to Common Stock [Member] Treasury Stock [Member]	Conversion of Series D Preferred to Common Stock [Member] Additional Paid-in Capital [Member]	Conversion of Series D Preferred to Common Stock [Member] AOCI Attributable to Parent [Member]	Conversion of Series D Preferred to Common Stock [Member] Retained Earnings [Member]	Conversion of Series D Preferred to Common Stock [Member]	Exchange of Series A Preferred Stock for Series A-1 Preferred Stock [Member] Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Exchange of Series A Preferred Stock for Series A-1 Preferred Stock [Member] Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Exchange of Series A Preferred Stock for Series A-1 Preferred Stock [Member] Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Exchange of Series A Preferred Stock for Series A-1 Preferred Stock [Member] Common Stock [Member]	Exchange of Series A Preferred Stock for Series A-1 Preferred Stock [Member] Treasury Stock [Member]	Exchange of Series A Preferred Stock for Series A-1 Preferred Stock [Member] Additional Paid-in Capital [Member]	Exchange of Series A Preferred Stock for Series A-1 Preferred Stock [Member] AOCI Attributable to Parent [Member]	Exchange of Series A Preferred Stock for Series A-1 Preferred Stock [Member] Retained Earnings [Member]	Exchange of Series A Preferred Stock for Series A-1 Preferred Stock [Member]	Series A Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Series A Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Series A Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Series A Preferred Stock Dividends [Member] Common Stock [Member]	Series A Preferred Stock Dividends [Member] Treasury Stock [Member]	Series A Preferred Stock Dividends [Member] Additional Paid-in Capital [Member]	Series A Preferred Stock Dividends [Member] AOCI Attributable to Parent [Member]	Series A Preferred Stock Dividends [Member] Retained Earnings [Member]	Series A Preferred Stock Dividends [Member]	Series C Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Series C Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Series C Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Series C Preferred Stock Dividends [Member] Common Stock [Member]	Series C Preferred Stock Dividends [Member] Treasury Stock [Member]	Series C Preferred Stock Dividends [Member] Additional Paid-in Capital [Member]	Series C Preferred Stock Dividends [Member] AOCI Attributable to Parent [Member]	Series C Preferred Stock Dividends [Member] Retained Earnings [Member]	Series C Preferred Stock Dividends [Member]	Series A-1 Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Series A-1 Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Series A-1 Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Series A-1 Preferred Stock Dividends [Member] Common Stock [Member]	Series A-1 Preferred Stock Dividends [Member] Treasury Stock [Member]	Series A-1 Preferred Stock Dividends [Member] Additional Paid-in Capital [Member]	Series A-1 Preferred Stock Dividends [Member] AOCI Attributable to Parent [Member]	Series A-1 Preferred Stock Dividends [Member] Retained Earnings [Member]	Series A-1 Preferred Stock Dividends [Member]	Series D Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Series D Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Series D Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Series D Preferred Stock Dividends [Member] Common Stock [Member]	Series D Preferred Stock Dividends [Member] Treasury Stock [Member]	Series D Preferred Stock Dividends [Member] Additional Paid-in Capital [Member]	Series D Preferred Stock Dividends [Member] AOCI Attributable to Parent [Member]	Series D Preferred Stock Dividends [Member] Retained Earnings [Member]	Series D Preferred Stock Dividends [Member]	Series B Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Series B Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Series B Preferred Stock Dividends [Member] Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Series B Preferred Stock Dividends [Member] Common Stock [Member]	Series B Preferred Stock Dividends [Member] Treasury Stock [Member]	Series B Preferred Stock Dividends [Member] Additional Paid-in Capital [Member]	Series B Preferred Stock Dividends [Member] AOCI Attributable to Parent [Member]	Series B Preferred Stock Dividends [Member] Retained Earnings [Member]	Series B Preferred Stock Dividends [Member]	First Issuance [Member] Common Stock [Member]	First Issuance [Member] Additional Paid-in Capital [Member]	First Issuance [Member]	Second Issuance [Member] Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Second Issuance [Member] Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Second Issuance [Member] Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Second Issuance [Member] Common Stock [Member]	Second Issuance [Member] Treasury Stock [Member]	Second Issuance [Member] Additional Paid-in Capital [Member]	Second Issuance [Member] AOCI Attributable to Parent [Member]	Second Issuance [Member] Retained Earnings [Member]	Second Issuance [Member]	Preferred Stock Outstanding [Member] Series A Preferred Stock [Member]	Preferred Stock Outstanding [Member] Series A-1 Preferred Stock [Member]	Preferred Stock Outstanding [Member] Series B Preferred Stock [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Series A Preferred Stock [Member]	Series A-1 Preferred Stock [Member]	Total
Balance (in shares) at Dec. 31, 2019																																																																																														37,467	0	239,400	113,353,176	(6,704,000)
Balance at Dec. 31, 2019																																																																																														$ 0	$ 0	$ 2	$ 1,133	$ (64)	$ 195,079	$ (1,741)	$ (203,171)			$ (8,762)
Accretion of Preferred Stock discount																																																																																														0	0	0	0	0	(175)	0	0			(175)
Stock-based compensation expense																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	124	0	0			124
Shares issued for cash (in shares)																																																																																														0	0	0	10,000,000	0
Issuance of common stock in lieu of cash																																																																																														$ 0	$ 0	$ 0	$ 100	$ 0	1,287	0	0			1,387
Foreign currency translation adjustment																																																																																														0	0	0	0	0	0	31	0			31
Net income (loss)																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	0	0	(3,124)			(3,124)
Dividends																																					$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ (937)	$ (937)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ (250)	$ (250)
Common stock issued in exchange for unexercised options (in shares)																																																																																														0	0	0	400,000	0
Common stock issued in exchange for unexercised options																																																																																														$ 0	$ 0	$ 0	$ 4	$ 0	58	0	0			62
Balance (in shares) at Mar. 31, 2020																																																																																														37,467	0	239,400	123,753,176	(6,704,000)
Balance at Mar. 31, 2020																																																																																														$ 0	$ 0	$ 2	$ 1,237	$ (64)	196,373	(1,710)	(207,482)			(11,644)
Balance (in shares) at Dec. 31, 2019																																																																																														37,467	0	239,400	113,353,176	(6,704,000)
Balance at Dec. 31, 2019																																																																																														$ 0	$ 0	$ 2	$ 1,133	$ (64)	195,079	(1,741)	(203,171)			(8,762)
Net income (loss)																																																																																																								(6,652)
Balance (in shares) at Sep. 30, 2020																																																																																														18,917	18,200	239,400	138,263,629	(6,704,000)
Balance at Sep. 30, 2020																																																																																														$ 0	$ 0	$ 2	$ 1,382	$ (64)	199,870	(1,815)	(212,297)			(12,922)
Balance (in shares) at Mar. 31, 2020																																																																																														37,467	0	239,400	123,753,176	(6,704,000)
Balance at Mar. 31, 2020																																																																																														$ 0	$ 0	$ 2	$ 1,237	$ (64)	196,373	(1,710)	(207,482)			(11,644)
Accretion of Preferred Stock discount																																																																																														0	0	0	0	0	(172)	0	0			(172)
Stock-based compensation expense																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	40	0	0			40
Shares issued for cash (in shares)																																																																																														0	0	0	2,500,000	0
Issuance of common stock in lieu of cash																																																																																														$ 0	$ 0	$ 0	$ 25	$ 0	215	0	0			240
Foreign currency translation adjustment																																																																																														0	0	0	0	0	0	(64)	0			(64)
Net income (loss)																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	0	0	(2,902)			(2,902)
Dividends																																														$ 0	$ 0	$ 0	$ 0	$ 0	0	0	(250)	(250)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ (937)	$ (937)										$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ (25)	$ (25)
Common stock issued in exchange for unexercised options (in shares)																																																																																														0	0	0	288,695	0
Common stock issued in exchange for unexercised options																																																																																														$ 0	$ 0	$ 0	$ 3	$ 0	93	0	0			96
Issuance of common stock for financing facility (in shares)																																																																																														0	0	0	2,500,000	0
Issuance of common stock for financing facility																																																																																														$ 0	$ 0	$ 0	$ 25	$ 0	375	0	0			400
Additional minimum pension liability																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	0	0	0			0
Balance (in shares) at Jun. 30, 2020																																																																																														37,467	0	239,400	129,041,871	(6,704,000)
Balance at Jun. 30, 2020																																																																																														$ 0	$ 0	$ 2	$ 1,290	$ (64)	196,924	(1,774)	(211,596)			(15,218)
Accretion of Preferred Stock discount																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	(170)	0	0			(170)
Shares issued pursuant to RSU vesting (in shares)																																																																																														0	0	0	74,448	0
Stock-based compensation expense																																																																																														$ 0	$ 0	$ 0	$ 1	$ 0	121	0	0			122
Shares issued for cash (in shares)																																																																																														0	0	0	3,200,000	0
Issuance of common stock in lieu of cash																																																																																														$ 0	$ 0	$ 0	$ 32	$ 0	601	0	0			633
Shares issued pursuant to conversion (in shares)										0	(350)	0	538,452	0														(18,550)	18,550	0	0	0
Conversion of preferred stock to common stock										$ 0	$ 0	$ 0	$ 5	$ 0	$ (5)	$ 0	$ 0	$ 0										$ 0	$ 0	$ 0	$ 0	$ 0	$ 1,849	$ 0	$ 0	$ 1,849
Foreign currency translation adjustment																																																																																														0	0	0	0	0	0	(41)	0			(41)
Dividends (in shares)																																					0	0	0	219,374	0					0	0	0	5,176,734	0
Dividends																																					$ (0)	$ (0)	$ (0)	$ (2)	$ (0)	(22)	(0)	(0)	(24)	$ (0)	$ (0)	$ (0)	$ (52)	$ (0)	(523)	(0)	75	(500)
Net income (loss)																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	0	0	(626)			(626)
Common stock issued in exchange for unexercised options (in shares)																																																																																														0	0	0	12,750	0
Common stock issued in exchange for unexercised options																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	5	0	0			5
Dividends																																					$ 0	$ 0	$ 0	$ 2	$ 0	22	0	0	$ 24	$ 0	$ 0	$ 0	$ 52	$ 0	$ 523	$ 0	$ (75)	$ 500
Preferred Stock Dividends, Shares (in shares)																																					0	0	0	219,374	0					0	0	0	5,176,734	0
Balance (in shares) at Sep. 30, 2020																																																																																														18,917	18,200	239,400	138,263,629	(6,704,000)
Balance at Sep. 30, 2020																																																																																														$ 0	$ 0	$ 2	$ 1,382	$ (64)	199,870	(1,815)	(212,297)			(12,922)
Balance (in shares) at Dec. 31, 2020																																																																																														14,911	14,782	239,400	180,096,317	(6,704)
Balance at Dec. 31, 2020																																																																																																$ 2	$ 1,801	$ (64)	193,652	(1,989)	(213,225)			(19,823)
Accretion of Preferred Stock discount																																																																																																			(1,817)					(1,817)
Shares issued pursuant to RSU vesting (in shares)																																																																																																	161,168
Stock-based compensation expense																																																																																																	$ 2		76					78
Shares issued for cash (in shares)																																																																																																	242,647
Issuance of common stock in lieu of cash																																																																																																	$ 2		19					21
Issuance of common stock pursuant to warrant exercise (in shares)																																																																																																	400
Issuance of common stock pursuant to warrant exercise																																																																																																			0
Shares issued pursuant to conversion (in shares)	(8,762)			43,819,500							(8,860)		44,300,000									6,115,324
Conversion of preferred stock to common stock				$ 438		$ (438)					$ 0		$ 443		(443)							$ 59		$ 630			$ 687
Conversion of preferred stock to common stock																										$ (2)
Foreign currency translation adjustment																																																																																																				54				54
Dividends (in shares)																																								1,050,826																		963,266
Dividends																																								$ 11		81		(92)											0			$ 10		73		(83)
Dividends																																																																					$ (248)			$ (248)
Net income (loss)																																																																																																					(1,885)			(1,885)
Dividends																																								$ (11)		(81)		92											$ 0			$ (10)		(73)		83
Preferred Stock Dividends, Shares (in shares)																																								1,050,826																		963,266
Balance (in shares) at Mar. 31, 2021																																																																																														6,149	5,922	239,400	276,749,448	(6,704)
Balance at Mar. 31, 2021																																																																																																$ 2	$ 2,766	$ (64)	191,585	(1,935)	(215,287)			(22,933)
Balance (in shares) at Dec. 31, 2020																																																																																														14,911	14,782	239,400	180,096,317	(6,704)
Balance at Dec. 31, 2020																																																																																																$ 2	$ 1,801	$ (64)	193,652	(1,989)	(213,225)			$ (19,823)
Shares issued pursuant to RSU vesting (in shares)																																																																																																								860,729
Shares issued for cash (in shares)																																																																																																								1,000,000
Shares issued pursuant to conversion (in shares)									74,562,000									73,910,000									11,149,123
Dividends (in shares)																																													1,911,587																		1,789,587																																							1,789,587	1,789,587
Net income (loss)																																																																																																								$ 9,871
Issuance of common stock for financing facility (in shares)																																																																																																								1,000,000
Preferred Stock Dividends, Shares (in shares)																																													1,911,587																		1,789,587																																							1,789,587	1,789,587
Balance (in shares) at Sep. 30, 2021																																																																																														0	0	239,400	347,200,961	(6,704)
Balance at Sep. 30, 2021																																																																																														$ 0	$ 0	$ 2	$ 3,471	$ (64)	188,404	(1,925)	(203,636)			$ (13,748)
Balance (in shares) at Mar. 31, 2021																																																																																														6,149	5,922	239,400	276,749,448	(6,704)
Balance at Mar. 31, 2021																																																																																																$ 2	$ 2,766	$ (64)	191,585	(1,935)	(215,287)			(22,933)
Accretion of Preferred Stock discount																																																																																																			(1,732)					(1,732)
Shares issued pursuant to RSU vesting (in shares)																																																																																																	656,410
Stock-based compensation expense																																																																																																	$ 7		301					308
Shares issued for cash (in shares)																																																																																		1,000,000			0	0	0	178,571	0
Issuance of common stock in lieu of cash																																																																																		$ 10	$ 90	$ 100	$ 0	$ 0	$ 0	$ 2	$ 0	$ 11	$ 0	$ 0	$ 13
Shares issued pursuant to conversion (in shares)	(3,819)	0	0	19,095,500	0					0	(3,683)	0	18,416,000	0					0	0	0	858,291	0
Conversion of preferred stock to common stock		$ 0	$ 0	$ 191	$ 0	(191)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 184	$ 0	(184)	0	0	$ 0	$ 0	$ 0	$ 0	$ 8	$ 0	51	$ 0		$ 59
Foreign currency translation adjustment																																																																																														$ 0	$ 0	0		0	0	(15)	0			(15)
Dividends (in shares)																																					0	0	0	750,925	0														0	0	0	720,978	0
Dividends																																					$ 0	$ 0	$ 0	$ 8	$ 0	30	0	(38)	$ 0										$ 0	$ 0	$ 0	$ 7	$ 0	29	0	(36)	$ 0
Dividends																																																																$ 0	$ 0	$ 0	$ 0	$ 0	(251)	$ 0	$ 0	(251)
Net income (loss)																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	0	0	11,266			11,266
Issuance of common stock as issuance costs (in shares)																																																																																																	1,000,000
Issuance of common stock as issuance costs																																																																																																	$ 10		60					70
Dividends																																																																									$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ (25)	$ (25)
Dividends																																					$ 0	$ 0	$ 0	$ (8)	$ 0	(30)	0	38	0										$ 0	$ 0	$ 0	$ (7)	$ 0	(29)	0	36	0
Preferred Stock Dividends, Shares (in shares)																																					0	0	0	750,925	0														0	0	0	720,978	0
Balance (in shares) at Jun. 30, 2021																																																																																														2,330	2,239	239,400	319,426,123	(6,704)
Balance at Jun. 30, 2021																																																																																														$ 0	$ 0	$ 2	$ 3,193	$ (64)	189,799	(1,950)	(204,120)			(13,140)
Accretion of Preferred Stock discount																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	(1,665)	0	0			(1,665)
Shares issued pursuant to RSU vesting (in shares)																																																																																														0	0	0	43,151	0
Stock-based compensation expense																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	556	0	0			556
Shares issued for cash (in shares)																																																																																														0	0	0	500,000	0
Issuance of common stock in lieu of cash																																																																																														$ 0	$ 0	$ 0	$ 5	$ 0	20	0	0			25
Shares issued pursuant to conversion (in shares)	(2,330)	0	0	11,647,000	0					0	(2,239)	0	11,194,000	0					0	0	0	4,175,508	0
Conversion of preferred stock to common stock	$ 0	$ 0	$ 0	$ 116	$ 0	$ (116)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 112	$ 0	$ (112)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 43	$ 0	$ 167	$ 0	$ 0	$ 210
Foreign currency translation adjustment																																																																																														0	0	0	0	0	0	25	0			25
Dividends (in shares)																																					0	0	0	109,836	0														0	0	0	105,343	0																																											109,836	105,343
Dividends																																					$ 0	$ 0	$ 0	$ 1	$ 0	2	0	(3)	0										$ 0	$ 0	$ 0	$ 1	$ 0	2	0	(3)	0
Dividends																																																																$ 0	$ 0	$ 0	$ 0	$ 0	$ (249)	$ 0	$ 0	$ (249)
Net income (loss)																																																																																														$ 0	$ 0	$ 0	$ 0	$ 0	0	0	490			490
Dividends																																					$ 0	$ 0	$ 0	$ (1)	$ 0	$ (2)	$ 0	$ 3	$ 0										$ 0	$ 0	$ 0	$ (1)	$ 0	$ (2)	$ 0	$ 3	$ 0
Preferred Stock Dividends, Shares (in shares)																																					0	0	0	109,836	0														0	0	0	105,343	0																																											109,836	105,343
Balance (in shares) at Sep. 30, 2021																																																																																														0	0	239,400	347,200,961	(6,704)
Balance at Sep. 30, 2021																																																																																														$ 0	$ 0	$ 2	$ 3,471	$ (64)	$ 188,404	$ (1,925)	$ (203,636)			$ (13,748)