Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 88,806	$ 109,155
Accounts receivable (less reserve for doubtful accounts of $315 and $162 as of June 30, 2020 and December 31, 2019, respectively; including $108 and $186 from related parties as of June 30, 2020 and December 31, 2019, respectively)	9,526	10,906
Inventory	13,789	10,463
Prepaid expenses and other current assets	2,117	2,137
Total current assets	114,238	132,661
Restricted cash	1,000	1,026
Property and equipment, net	12,353	12,047
Intangible assets, net	13,310	14,307
Goodwill	9,390	9,353
Right-of-use assets	12,120
Other non-current assets	529	557
Total assets	162,940	169,951
Current liabilities:
Accounts payable (including $16 and $36 to related parties as of June 30, 2020 and December 31, 2019, respectively)	4,878	5,777
Accrued compensation and benefits	5,375	6,570
Other accrued expenses (including $228 and $0 to related parties as of June 30, 2020 and December 31, 2019, respectively)	2,597	2,498
Deferred revenue (including $15 and $55 with related parties as of June 30, 2020 and December 31, 2019, respectively)	5,019	4,697
Current portion of long term debt		75
Short term lease liabilities	729
Other current liabilities	299	216
Total current liabilities	18,897	19,833
Deferred revenue, net of current portion	384	466
Long term debt, net of current portion	7,630	7,587
Long term lease liabilities	22,458
Other non-current liabilities	2,537	13,407
Total liabilities	51,906	41,293
Commitments and contingencies (Note 11)
Stockholders' equity:
Common stock, $0.001 par value:Authorized-120,000,000 shares as of June 30, 2020 and December 31, 2019; issued and outstanding - 28,381,280 and 28,112,201 shares as of June 30, 2020 and December 31, 2019, respectively	28	28
Additional paid-in capital	351,188	345,027
Accumulated other comprehensive loss	(26)	(153)
Accumulated deficit	(240,156)	(216,244)
Total stockholders' equity	111,034	128,658
Total liabilities and stockholders' equity	$ 162,940	$ 169,951