Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 28,622	$ 36,687
Accounts receivable, net of allowances of $482 and $438	18,171	13,353
Inventory	35,351	29,570
Prepaid expenses and other current assets	6,147	4,973
Total current assets	88,291	84,583
Property and equipment, net	19,811	17,968
Intangible assets, net	2,361	1,836
Goodwill	1,387	1,387
Other assets	4,346	4,374
Total assets	116,196	110,148
Current liabilities:
Accounts payable	15,581	12,920
Accrued liabilities	11,870	12,650
Customer advances	753	575
Deferred revenue	541	386
Current portion of long-term debt	3,491	2,363
Total current liabilities	32,236	28,894
Non-current income taxes payable	4,185	3,930
Long-term debt	13,958	15,108
Other long-term liabilities	1,232	933
Total liabilities	51,611	48,865
Stockholders' equity:
Convertible preferred stock - $0.0001 par value; 129,478 shares authorized, 24,642 shares issued and outstanding at March 31, 2018 and December 31, 2017. Liquidation preference of $148,454 at March 31, 2018 and December 31, 2017.	12	12
Common stock - $0.0001 par value; 190,000 shares authorized, 3,056 shares issued and outstanding at March 31, 2018 and 190,000 shares authorized, 2,979 shares issued and outstanding at December 31, 2017.	2	2
Additional paid-in capital	180,093	180,657
Accumulated other comprehensive income (loss)	231	(719)
Accumulated deficit	(115,753)	(118,669)
Total stockholders’ equity	64,585	61,283
Total liabilities and stockholders’ equity	$ 116,196	$ 110,148