Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 51,184	$ 9,866
Accounts receivable, net	3,619	3,462
Other receivables	449	173
Inventories, net	8,275	9,384
Deferred cost of goods sold	742	690
Prepaid expense and other current assets	284	569
Total current assets	64,553	24,144
Property and equipment, net	9,789	10,219
Other assets	153	153
Total assets	74,495	34,516
Current liabilities:
Accounts payable	5,128	4,591
Accrued expense and other current liabilities	5,071	5,532
Deferred revenue	1,784	1,623
Total current liabilities	11,983	11,746
Long-term debt, related parties	33,130	58,978
Deferred rent liability	51	70
Derivative liabilities	24	222
Total liabilities	45,188	71,016
Commitments and Contingencies
Stockholders' equity (deficit)
Common stock, $0.001 par value, 300,000,000 shares authorized; 6,842,978 and 1,590,948 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively	7	2
Convertible preferred stock, $0.001 par value, 50,000,000 and 10,000,000 shares authorized at March 31, 2017 and December 31, 2016, respectively; 2,750,000 and 0 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively. (aggregate liquidation value of $27,548 and $0 at March 31, 2017 and December 31, 2016)	3	0
Additional paid-in capital	465,723	387,737
Accumulated deficit	(436,426)	(424,239)
Total stockholders' equity (deficit)	29,307	(36,500)
Total liabilities and stockholders' equity (deficit)	$ 74,495	$ 34,516