Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets
Cash	$ 18,656	$ 25,583
Accounts receivable	910	177
Other receivables	182	98
Inventory	731	392
Prepaid expenses	352	447
Other current assets		264
Total current assets	20,831	26,961
Property and equipment, net	693	554
Other assets
Operating lease right-of-use asset, net	650
Non-current receivables	306	294
Other non-current assets	18	18
Total other assets	974	312
TOTAL ASSETS	22,498	27,827
Current liabilities
Accounts payable	2,474	2,392
Accrued liabilities	1,518	1,812
Operating lease liability	148
Derivative financial instruments	5,743	13,769
Total current liabilities	9,883	17,973
Non-current liabilities
Operating lease liability	597
TOTAL LIABILITIES	10,480	17,973
Commitments and contingencies (Note 6)
STOCKHOLDERS’ EQUITY
Preferred stock, $0.001 par value; 10,000,000 shares authorized, no shares issued and outstanding as of March 31, 2019 and December 31, 2018
Class A common stock, $0.001 par value; 150,000,000 shares authorized; 25,844,180 and 25,827,860 shares issued and outstanding as of March 31, 2019 and December 31, 2018, respectively	26	26
Additional paid-in capital	106,363	105,411
Accumulated other comprehensive loss	(703)	(591)
Accumulated deficit	(93,668)	(94,992)
TOTAL STOCKHOLDERS’ EQUITY	12,018	9,854
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 22,498	$ 27,827