Condensed Consolidated Statements of Stockholders' Deficit (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Stock Subscriptions Receivable [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2019	390,449,879			134,806,051
Balance at Dec. 31, 2019	$ 390	$ 231,253	$ (30)	$ (500)	$ (318,873)	$ (87,760)
Shares issued upon exercise of warrants (in shares)	1,141,405			0
Shares issued upon exercise of warrants	$ 2	(2)	0	$ 0	0	0
Net income (loss)	$ 0	0	0	$ 0	(5,164)	(5,164)
Balance (in shares) at Mar. 31, 2020	391,591,284			134,806,051
Balance at Mar. 31, 2020	$ 392	231,251	(30)	$ (500)	(324,037)	(92,924)
Balance (in shares) at Dec. 31, 2019	390,449,879			134,806,051
Balance at Dec. 31, 2019	$ 390	231,253	(30)	$ (500)	(318,873)	(87,760)
Net income (loss)						(6,526)
Balance (in shares) at Jun. 30, 2020	392,864,182			134,806,051
Balance at Jun. 30, 2020	$ 393	231,250	(30)	$ (500)	(325,399)	(94,286)
Balance (in shares) at Mar. 31, 2020	391,591,284			134,806,051
Balance at Mar. 31, 2020	$ 392	231,251	(30)	$ (500)	(324,037)	(92,924)
Shares issued upon exercise of warrants (in shares)	1,272,898			0
Shares issued upon exercise of warrants	$ 1	(1)	0	$ 0	0	0
Net income (loss)	$ 0	0	0	$ 0	(1,362)	(1,362)
Balance (in shares) at Jun. 30, 2020	392,864,182			134,806,051
Balance at Jun. 30, 2020	$ 393	231,250	(30)	$ (500)	(325,399)	(94,286)
Net income (loss)	$ 0	0	0	$ 0	(1,852)	(1,852)
Balance (in shares) at Sep. 30, 2020	392,864,182			134,806,051
Balance at Sep. 30, 2020	$ 393	231,250	(30)	$ (500)	(327,251)	(96,138)
Balance (in shares) at Dec. 31, 2020	392,864,182			134,806,051
Balance at Dec. 31, 2020	$ 393	231,250	(30)	$ (500)	(333,262)	(102,149)
Shares issued upon exercise of warrants (in shares)	1,034,702			0
Shares issued upon exercise of warrants	$ 1	(1)	0	$ 0	0	0
Net income (loss)	$ 0	0	0	$ 0	383	383
Balance (in shares) at Mar. 31, 2021	393,898,884			134,806,051
Balance at Mar. 31, 2021	$ 394	231,249	(30)	$ (500)	(332,879)	(101,766)
Balance (in shares) at Dec. 31, 2020	392,864,182			134,806,051
Balance at Dec. 31, 2020	$ 393	231,250	(30)	$ (500)	(333,262)	(102,149)
Net income (loss)						1,465
Balance (in shares) at Jun. 30, 2021	393,898,884			134,806,051
Balance at Jun. 30, 2021	$ 394	231,249	(30)	$ (500)	(331,797)	(100,684)
Balance (in shares) at Mar. 31, 2021	393,898,884			134,806,051
Balance at Mar. 31, 2021	$ 394	231,249	(30)	$ (500)	(332,879)	(101,766)
Net income (loss)	$ 0	0	0	$ 0	1,082	1,082
Balance (in shares) at Jun. 30, 2021	393,898,884			134,806,051
Balance at Jun. 30, 2021	$ 394	$ 231,249	$ (30)	$ (500)	$ (331,797)	$ (100,684)