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, 2017	4,250	14,021,422
Balance at Dec. 31, 2017		$ 14	$ 84,036	$ (73,958)	$ 10,092
Stock based compensation			1,131		1,131
Stock option/warrant exercises (in shares)		2,684,899
Stock option/warrant exercises		$ 3	11,721		11,724
Stock issued – on vested RSUs (in shares)		96,594
Stock issued – on vested RSUs
Net income				2,373	2,373
Series A preferred stock redemption (in shares)	(1,063)
Series A preferred stock redemption			(1,063)		(1,063)
Stock Issued for Private Equity Transaction – Casdin Capital, net of legal fees of $85,000 (in shares)		1,428,571
Stock Issued for Private Equity Transaction – Casdin Capital, net of legal fees of $85,000		$ 1	19,914		19,915
Stock issued for services (in shares)		5,939
Stock issued for services			36		36
Preferred stock dividends				(279)	(279)
Balance (in shares) at Sep. 30, 2018	3,187	18,237,425
Balance at Sep. 30, 2018		$ 18	115,775	(71,864)	43,929
Balance (in shares) at Jun. 30, 2018	3,187	16,107,505
Balance at Jun. 30, 2018		$ 16	92,654	(73,015)	19,655
Stock based compensation			383		383
Stock option/warrant exercises (in shares)		681,294
Stock option/warrant exercises		$ 1	2,824		2,825
Stock issued – on vested RSUs (in shares)		20,055
Stock issued – on vested RSUs
Net income				1,231	1,231
Stock Issued for Private Equity Transaction – Casdin Capital, net of legal fees of $85,000 (in shares)		1,428,571
Stock Issued for Private Equity Transaction – Casdin Capital, net of legal fees of $85,000		$ 1	19,914		19,915
Preferred stock dividends				(80)	(80)
Balance (in shares) at Sep. 30, 2018	3,187	18,237,425
Balance at Sep. 30, 2018		$ 18	115,775	(71,864)	43,929
Balance (in shares) at Dec. 31, 2018		18,547,406
Balance at Dec. 31, 2018		$ 19	114,160	(71,031)	43,148
Stock based compensation			1,907		1,907
Shares Issued as consideration in SAVSU Acquisition (in shares)		1,100,000
Shares Issued as consideration in SAVSU Acquisition		$ 1	19,931		19,932
Stock option/warrant exercises (in shares)		590,737
Stock option/warrant exercises			1,394		1,394
Stock issued – on vested RSUs (in shares)		106,682
Stock issued – on vested RSUs
Net income				10,581	10,581
Balance (in shares) at Sep. 30, 2019		20,344,825
Balance at Sep. 30, 2019		$ 20	137,392	(60,450)	76,962
Balance (in shares) at Jun. 30, 2019		18,898,609
Balance at Jun. 30, 2019		$ 19	116,013	(69,766)	46,266
Stock based compensation			654		654
Shares Issued as consideration in SAVSU Acquisition (in shares)		1,100,000
Shares Issued as consideration in SAVSU Acquisition		$ 1	19,931		19,932
Stock option/warrant exercises (in shares)		325,676
Stock option/warrant exercises			794		794
Stock issued – on vested RSUs (in shares)		20,540
Stock issued – on vested RSUs
Net income				9,316	9,316
Balance (in shares) at Sep. 30, 2019		20,344,825
Balance at Sep. 30, 2019		$ 20	$ 137,392	$ (60,450)	$ 76,962