Condensed Consolidated Statements of Stockholders Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid In Capital	Accumulated Deficit
Beginning Balance (in shares) at Dec. 31, 2017		2,535,766
Beginning Balance at Dec. 31, 2017	$ 13,000	$ 2	$ 66,223	$ (53,225)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options	0
Exercise of warrants (in shares)		2,400
Exercise of warrants	24		24
Issuance of common stock, net of issuance costs (in shares)		48,634
Issuance of common stock, net of issuance costs	642	$ 1	641
Stock based compensation from issuance of stock options	1,609		1,609
Net income/loss	(9,343)			(9,343)
Ending Balance (in shares) at Mar. 31, 2018		2,586,800
Ending Balance at Mar. 31, 2018	5,932	$ 3	68,497	(62,568)
Beginning Balance (in shares) at Dec. 31, 2017		2,535,766
Beginning Balance at Dec. 31, 2017	13,000	$ 2	66,223	(53,225)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/loss	(11,658)
Ending Balance (in shares) at Sep. 30, 2018		3,795,429
Ending Balance at Sep. 30, 2018	25,171	$ 4	90,050	(64,883)
Beginning Balance (in shares) at Mar. 31, 2018		2,586,800
Beginning Balance at Mar. 31, 2018	5,932	$ 3	68,497	(62,568)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		7,063
Exercise of stock options	0
Stock issued for services (in shares)		38,166
Stock issued for services	782		782
Issuance of common stock, net of issuance costs (in shares)		79,616
Issuance of common stock, net of issuance costs	1,527		1,527
Stock based compensation from issuance of stock options	1,532		1,532
Net income/loss	(1,397)			(1,397)
Ending Balance (in shares) at Jun. 30, 2018		2,711,645
Ending Balance at Jun. 30, 2018	8,376	$ 3	72,338	(63,965)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued to net profit partner (in shares)		160,000
Stock issued to net profit partner	1,600		1,600
Stock issued for services (in shares)		1,000
Stock issued for services	10		10
Issuance of common stock, net of issuance costs (in shares)		922,784
Issuance of common stock, net of issuance costs	14,603	$ 1	14,602
Stock based compensation from issuance of stock options	1,500		1,500
Net income/loss	(918)			(918)
Ending Balance (in shares) at Sep. 30, 2018		3,795,429
Ending Balance at Sep. 30, 2018	25,171	$ 4	90,050	(64,883)
Beginning Balance (in shares) at Dec. 31, 2018		3,845,361
Beginning Balance at Dec. 31, 2018	16,859	$ 4	91,276	(74,421)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		80,000
Exercise of stock options	601		601
Stock based compensation from issuance of stock options	1,066		1,066
Net income/loss	(1,736)			(1,736)
Ending Balance (in shares) at Mar. 31, 2019		3,925,361
Ending Balance at Mar. 31, 2019	16,790	$ 4	92,943	(76,157)
Beginning Balance (in shares) at Dec. 31, 2018		3,845,361
Beginning Balance at Dec. 31, 2018	16,859	$ 4	91,276	(74,421)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs (in shares)		229,261
Net income/loss	10,526
Ending Balance (in shares) at Sep. 30, 2019		4,074,622
Ending Balance at Sep. 30, 2019	31,606	$ 4	95,497	(63,895)
Beginning Balance (in shares) at Mar. 31, 2019		3,925,361
Beginning Balance at Mar. 31, 2019	16,790	$ 4	92,943	(76,157)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		100,139
Exercise of stock options	834		834
Stock based compensation from issuance of stock options	861		861
Net income/loss	1,578			1,578
Ending Balance (in shares) at Jun. 30, 2019		4,025,500
Ending Balance at Jun. 30, 2019	20,063	$ 4	94,638	(74,579)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		49,122
Exercise of stock options	270		270
Stock based compensation from issuance of stock options	589		589
Net income/loss	10,684			10,684
Ending Balance (in shares) at Sep. 30, 2019		4,074,622
Ending Balance at Sep. 30, 2019	$ 31,606	$ 4	$ 95,497	$ (63,895)