Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 6 months ended Jun. 30, 2018 - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2017	10,849,000
Balance at Dec. 31, 2017	$ 11	$ 125,999	$ (77,836)	$ (1)	$ 48,173
Issuance of common stock, net of issuance costs of $2,190 (in shares)	3,249,000
Issuance of common stock, net of issuance costs of $2,190	$ 3	23,797			23,800
Issuance of common stock warrants		455			$ 455
Option exercises (in shares)	32,000				32,113
Option exercises		231			$ 231
Restricted stock issued, net of stock forfeited (in shares)	124,000
Restricted stock issued, net of stock forfeited
Stock-based compensation		1,254			1,254
Unrealized holding period gain				1	1
Net loss			(22,311)		(22,311)
Balance (in shares) at Jun. 30, 2018	14,254,000
Balance at Jun. 30, 2018	$ 14	$ 151,736	$ (100,147)		$ 51,603