Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member] Series A Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2018	0	18,547,406
Balance at Dec. 31, 2018	$ 0	$ 19	$ 113,008	$ (98,395)	$ 14,632
Stock-based compensation	$ 0	$ 0	2,179	0	2,179
Stock option exercises (in shares)	0	474,237
Stock option exercises	$ 0	$ 0	841	0	841
Warrant exercises (in shares)		116,500
Warrant exercises		$ 0	2,247	0	2,247
Stock issued – on vested RSUs (in shares)	0	106,682
Stock issued – on vested RSUs	$ 0	$ 0	0	0	0
Net income	$ 0	$ 0	0	(4,640)	(4,640)
Shares issued as consideration in SAVSU acquisition (in shares)		1,100,000
Shares issued as consideration in SAVSU acquisition		$ 1	19,931	0	19,932
Balance (in shares) at Sep. 30, 2019	0	20,344,825
Balance at Sep. 30, 2019	$ 0	$ 20	138,206	(103,035)	35,191
Balance (in shares) at Jun. 30, 2019	0	18,898,609
Balance at Jun. 30, 2019	$ 0	$ 19	115,357	(113,304)	2,072
Stock-based compensation	$ 0	$ 0	829	0	829
Stock option exercises (in shares)	0	238,176
Stock option exercises	$ 0	$ 0	378	0	378
Warrant exercises (in shares)		87,500
Warrant exercises		$ 0	1,711	0	1,711
Stock issued – on vested RSUs (in shares)	0	20,540
Stock issued – on vested RSUs	$ 0	$ 0	0	0	0
Net income	$ 0	$ 0	0	10,269	10,269
Shares issued as consideration in SAVSU acquisition (in shares)	0	1,100,000
Shares issued as consideration in SAVSU acquisition	$ 0	$ 1	19,931	0	19,932
Balance (in shares) at Sep. 30, 2019	0	20,344,825
Balance at Sep. 30, 2019	$ 0	$ 20	138,206	(103,035)	35,191
Balance (in shares) at Dec. 31, 2019	0	20,825,452
Balance at Dec. 31, 2019	$ 0	$ 21	143,485	(100,052)	43,454
Stock issued as 2019 bonus payout	$ 0	$ 0	314	0	314
Sale of common stock, net of costs (in shares)	0	7,856,012
Sale of common stock, net of costs	$ 0	$ 8	100,113	0	100,121
Common stock issued for services (in shares)		3,175
Common stock issued for services		$ 0	60	0	60
Stock-based compensation	$ 0	$ 0	3,818	0	3,818
Stock option exercises (in shares)	0	528,793
Stock option exercises	$ 0	$ 0	1,028	0	1,028
Cashless exercises of 3,871,405 warrants (in shares)	0	2,747,970
Cashless exercises of warrants	$ 0	$ 3	33,108	0	33,111
Warrant exercises (in shares)		8,500
Warrant exercises		$ 0	150	0	150
Stock issued – on vested RSUs (in shares)	0	161,263
Stock issued – on vested RSUs	$ 0	$ 0	0	0	0
Net income	$ 0	$ 0	0	4,795	4,795
Balance (in shares) at Sep. 30, 2020	0	32,131,165
Balance at Sep. 30, 2020	$ 0	$ 32	282,076	(95,257)	186,851
Balance (in shares) at Jun. 30, 2020	0	25,982,367
Balance at Jun. 30, 2020	$ 0	$ 26	199,941	(94,124)	105,843
Sale of common stock, net of costs (in shares)	0	5,951,250
Sale of common stock, net of costs	$ 0	$ 6	80,201	0	80,207
Common stock issued for services (in shares)	0	3,175
Common stock issued for services	$ 0	$ 0	60	0	60
Stock-based compensation	$ 0	$ 0	1,560	0	1,560
Stock option exercises (in shares)	0	118,000
Stock option exercises	$ 0	$ 0	244	0	244
Warrant exercises (in shares)		3,500
Warrant exercises		$ 0	70	0	70
Stock issued – on vested RSUs (in shares)	0	72,873
Stock issued – on vested RSUs	$ 0	$ 0	0	0	0
Net income	$ 0	$ 0	0	(1,133)	(1,133)
Balance (in shares) at Sep. 30, 2020	0	32,131,165
Balance at Sep. 30, 2020	$ 0	$ 32	$ 282,076	$ (95,257)	$ 186,851