Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2018	$ 426	$ 115,719	$ (46,932)	$ 69,213
Balance (in shares) at Dec. 31, 2018	42,602,431
Issuance of common stock upon exercise of stock options		9		9
Issuance of common stock upon exercise of stock options (in shares)	10,000
Issuance of common stock for services		10		10
Issuance of common stock for services (in shares)	16,129
Stock compensation expense		890		890
Net income (loss)			(15,169)	(15,169)
Balance at Sep. 30, 2019	$ 426	116,628	(62,101)	54,953
Balance (in shares) at Sep. 30, 2019	42,628,560
Balance at Dec. 31, 2018	$ 426	115,719	(46,932)	$ 69,213
Balance (in shares) at Dec. 31, 2018	42,602,431
Issuance of common stock upon exercise of stock options (in shares)				10,000
Balance at Dec. 31, 2019	$ 426	117,557	(72,872)	$ 45,111
Balance (in shares) at Dec. 31, 2019	42,628,560
Balance at Jun. 30, 2019	$ 426	116,356	(64,768)	52,014
Balance (in shares) at Jun. 30, 2019	42,612,431
Issuance of common stock upon exercise of stock options		10		10
Issuance of common stock upon exercise of stock options (in shares)	16,129
Stock compensation expense		262		262
Net income (loss)			2,667	2,667
Balance at Sep. 30, 2019	$ 426	116,628	(62,101)	54,953
Balance (in shares) at Sep. 30, 2019	42,628,560
Balance at Dec. 31, 2019	$ 426	117,557	(72,872)	45,111
Balance (in shares) at Dec. 31, 2019	42,628,560
Issuance of common stock for services		35		35
Issuance of common stock for services (in shares)	35,714
Stock compensation expense	$ 0	524	0	524
Stock compensation expense (in shares)	0
Net income (loss)			(460)	(460)
Balance at Sep. 30, 2020	$ 426	118,116	(73,332)	45,210
Balance (in shares) at Sep. 30, 2020	42,664,274
Balance at Jun. 30, 2020	$ 426	117,890	(73,371)	44,945
Balance (in shares) at Jun. 30, 2020	42,628,560
Issuance of common stock for services		35		35
Issuance of common stock for services (in shares)	35,714
Stock compensation expense		191		191
Net income (loss)			39	39
Balance at Sep. 30, 2020	$ 426	$ 118,116	$ (73,332)	$ 45,210
Balance (in shares) at Sep. 30, 2020	42,664,274