Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2015		7,241,949
Balance at Dec. 31, 2015	$ 6,468,000	$ 7,000	$ 37,373,000	$ (30,912,000)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for compensation (in shares)		262,201
Stock issued to consultants for services (in shares)		8,549
Stock issued to consultants for services	17,000		17,000
Stock-based compensation	2,323,000		2,323,000
Sales of common stock, net of offering costs (in shares)		4,711,880
Sales of common stock, net of offering costs	15,798,000	$ 5,000	15,793,000
Issuance of common stock in the acquisition of business assets (in shares)		125,000
Issuance of common stock in the acquisition of business assets	545,000		545,000
Exercise of warrants, cashless (in shares)		21,068
Exercise of warrants for cash (in shares)		98,000
Exercise of warrants for cash	280,000		280,000
Net loss	(15,247,000)			(15,247,000)
Foreign currency translation adjustment, net of tax	$ (51,000)				$ (51,000)
Balance (in shares) at Dec. 31, 2016	12,468,647	12,468,647
Balance at Dec. 31, 2016	$ 10,133,000	$ 12,000	56,331,000	(46,159,000)	(51,000)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for compensation (in shares)		649,359
Issuance of common stock for compensation		$ 1,000	(1,000)
Stock-based compensation	4,136,000		4,136,000
Sales of common stock, net of offering costs (in shares)		3,603,817
Sales of common stock, net of offering costs	15,950,000	$ 4,000	15,946,000
Exercise of warrants, cashless (in shares)		147,847
Exercise of warrants for cash (in shares)		2,608,678
Exercise of warrants for cash	$ 11,960,000	$ 3,000	11,957,000
Exercise of stock options, cashless (in shares)		3,758
Exercise of warrants for cash (in shares)	32,928	29,170
Exercise of warrants for cash	$ 78,000		78,000
Net loss	(21,653,000)			(21,653,000)
Foreign currency translation adjustment, net of tax	$ 44,000				44,000
Balance (in shares) at Dec. 31, 2017	19,511,276	19,511,276
Balance at Dec. 31, 2017	$ 20,648,000	$ 20,000	$ 88,447,000	$ (67,812,000)	$ (7,000)