Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 33,636	$ 10,121
Short-term investments	66,905
Accounts receivable, net of allowances of $284 and $285, respectively	17,447	12,889
Inventory	27,734	11,837
Prepaid expenses and other current assets	3,004	1,095
Total current assets	148,726	35,942
Property and equipment, net of accumulated depreciation of $10,227 and $8,968, respectively	14,929	12,351
Other non-current assets		637
Goodwill	3,881	3,881
Other intangible assets, net		37
Total assets	167,536	52,848
Current liabilities:
Accounts payable	7,166	3,182
Accrued compensation and employee related benefits	7,647	4,038
Accrued liabilities	6,098	2,895
Current portion of long-term debt	2,589	5,227
Current portion of capital lease obligations	1,130	1,190
Current portion of deferred rent	306	258
Current portion of deferred revenue	445	684
Total current liabilities	25,381	17,474
Long-term debt, net of current portion	9,676	10,683
Capital lease obligations, net of current portion	1,698	2,526
Long-term liabilities—other	770	678
Warrant liability		2,865
Deferred rent, net of current portion	5,022	4,984
Deferred revenue, net of current portion	966	710
Total liabilities	43,513	39,920
Commitments and contingencies (Note 9)
Total redeemable convertible preferred stock		97,963
Stockholders’ (deficit) equity:
Preferred stock, $0.001 par value — 5,000 shares authorized; no shares issued and outstanding at December 31, 2016; no shares authorized, issued and outstanding at December 31, 2015
Common stock, $0.001 par value — 495,000 and 15,041 shares authorized; 20,336 and 4,382 shares issued and outstanding at December 31, 2016 and 2015, respectively	20	4
Additional paid-in capital	311,216	100,276
Accumulated other comprehensive income (loss)	(10)
Accumulated deficit	(187,203)	(185,315)
Total stockholders’ equity (deficit)	124,023	(85,035)
Total liabilities, redeemable convertible preferred stock and stockholders? (deficit) equity	$ 167,536	52,848
Series 1
Current liabilities:
Total redeemable convertible preferred stock		60,184
Series 2
Current liabilities:
Total redeemable convertible preferred stock		$ 37,779