CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 47,935	$ 10,121
Short-term investments	14,063
Accounts receivable, net	17,531	12,889
Inventory	20,486	11,837
Prepaid expenses and other current assets	1,628	1,095
Total current assets	101,643	35,942
Property and equipment, net	13,303	12,351
Other non-current assets		637
Goodwill	3,881	3,881
Other intangible assets, net		37
Total assets	118,827	52,848
Current liabilities:
Accounts payable	3,540	3,182
Accrued compensation and employee related benefits	5,374	4,038
Accrued liabilities	4,337	2,895
Current portion of long-term debt	1,419	5,227
Current portion of capital lease obligations	1,103	1,190
Current portion of deferred rent	227	258
Current portion of deferred revenue	413	684
Total current liabilities	16,413	17,474
Long-term debt, net of current portion	9,991	10,683
Capital lease obligations, net of current portion	1,842	2,526
Long-term liabilities—other	747	678
Warrant liability		2,865
Deferred rent, net of current portion	5,094	4,984
Deferred revenue, net of current portion	954	710
Total liabilities	35,041	39,920
Commitment and contingencies
Total redeemable convertible preferred stock		97,963
Stockholders' equity (deficit):
Common stock, $0.001 par value, 495,000 shares authorized; 18,780 and 4,382 shares issued and outstanding at September 30, 2016 and December 31, 2015, respectively	18	4
Additional paid-in capital	271,074	100,276
Accumulated deficit	(187,306)	(185,315)
Total stockholders' equity (deficit)	83,786	(85,035)
Total liabilities, redeemable convertible preferred stock and stockholders' equity (deficit)	$ 118,827	52,848
Series 1
Current liabilities:
Total redeemable convertible preferred stock		60,184
Series 2
Current liabilities:
Total redeemable convertible preferred stock		$ 37,779