Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 24,492	$ 29,727
Accounts receivable, net	2,657	3,170
Amounts due from related parties	523	486
Inventory	5,824	5,069
Prepaid expenses and other current assets	839	1,050
Total current assets	34,335	39,502
Property and equipment, net	3,123	1,920
Other assets	61	50
Total assets	37,519	41,472
Current liabilities:
Accounts payable	3,140	1,502
Accrued liabilities	1,926	1,811
Amounts due to related parties	2,076	1,359
Deferred income on shipments to distributors	1,470	1,827
Current portion of long-term debt	3,910	3,884
Total current liabilities	12,522	10,383
Long-term debt, net of current portion	3,517	4,218
Total liabilities	16,039	14,601
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value per share; 5,000,000 shares authorized as of March 31, 2017 and December 31, 2016; no shares issued and outstanding as of March 31, 2017 and December 31, 2016
Common stock, $0.0001 par value per share; 100,000,000 shares authorized as of March 31, 2017 and December 31, 2016; 12,500,178 and 12,498,128 shares issued and outstanding as of March 31, 2017 and December 31, 2016	1	1
Additional paid-in capital	124,004	123,309
Accumulated deficit	(102,525)	(96,439)
Total stockholders' equity	21,480	26,871
Total liabilities and stockholders' equity	$ 37,519	$ 41,472