Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2018	$ 7,604	$ 1	$ 61,628	$ (54,025)
Balance (in shares) at Dec. 31, 2018		72,732,292
Common stock issued for services	10		10
Common stock issued for services (in shares)		30,161
Stock based compensation	253		253
Common stock issued for stock options exercised	7		7
Common stock issued for stock options exercised (in shares)		71,084
Net loss	(1,449)			(1,449)
Balance at Mar. 31, 2019	6,425	$ 1	61,898	(55,474)
Balance (in shares) at Mar. 31, 2019		72,833,537
Balance at Dec. 31, 2018	7,604	$ 1	61,628	(54,025)
Balance (in shares) at Dec. 31, 2018		72,732,292
Net loss	(2,743)
Balance at Jun. 30, 2019	5,421	$ 1	62,188	(56,768)
Balance (in shares) at Jun. 30, 2019		72,876,186
Balance at Mar. 31, 2019	6,425	$ 1	61,898	(55,474)
Balance (in shares) at Mar. 31, 2019		72,833,537
Common stock issued for services	15		15
Common stock issued for services (in shares)		42,649
Stock based compensation	275		275
Net loss	(1,294)			(1,294)
Balance at Jun. 30, 2019	5,421	$ 1	62,188	(56,768)
Balance (in shares) at Jun. 30, 2019		72,876,186
Common stock issued for services	15		15
Common stock issued for services (in shares)		107,854
Stock based compensation	202		202
Net loss	(1,218)			(1,218)
Balance at Sep. 30, 2019	4,420	$ 1	62,405	(57,986)
Balance (in shares) at Sep. 30, 2019		72,984,040
Common stock issued for services	15		15
Common stock issued for services (in shares)		141,498
Stock based compensation	39		39
Net loss	(1,192)			(1,192)
Balance at Dec. 31, 2019	3,282	$ 1	62,459	(59,178)
Balance (in shares) at Dec. 31, 2019		73,125,538
Common stock issued for services	15		15
Common stock issued for services (in shares)		104,824
Stock based compensation	200		200
Net loss	(1,268)			(1,268)
Balance at Mar. 31, 2020	2,229	$ 1	62,674	(60,446)
Balance (in shares) at Mar. 31, 2020		73,230,362
Balance at Dec. 31, 2019	3,282	$ 1	62,459	(59,178)
Balance (in shares) at Dec. 31, 2019		73,125,538
Net loss	(2,373)
Balance at Jun. 30, 2020	1,196	$ 1	62,746	(61,551)
Balance (in shares) at Jun. 30, 2020		73,508,069
Balance at Mar. 31, 2020	2,229	$ 1	62,674	(60,446)
Balance (in shares) at Mar. 31, 2020		73,230,362
Common stock issued for services	26		26
Common stock issued for services (in shares)		277,707
Stock based compensation	46		46
Net loss	(1,105)			(1,105)
Balance at Jun. 30, 2020	$ 1,196	$ 1	$ 62,746	$ (61,551)
Balance (in shares) at Jun. 30, 2020		73,508,069