Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 75,649	$ 90,498
Restricted cash, current	619	661
Financial assets:
Accounts receivable	14,035	9,063
Contract assets	0	1,027
Unbilled receivables	12,412	10,099
Total Financial assets	26,447	20,189
Less: allowances	(34)	(34)
Total Financial assets, net	26,413	20,155
Inventories	686	371
Prepaid expenses and other current assets	3,131	2,520
Total current assets	106,498	114,205
Restricted cash	1,062	1,062
Investment in Equity Securities	1,000	0
Right-of-use assets - Operating leases, net	22,599	23,837
Right-of-use assets - Finance leases, net	170	268
Property and equipment, net	6,822	6,282
Goodwill	3,241	3,241
Other non-current assets	391	178
Total assets	141,783	149,073
Current liabilities:
Accounts payable	2,637	2,621
Accrued compensation	4,979	5,003
Other accrued liabilities	6,943	6,540
Current portion of lease obligations - Operating leases	2,482	1,107
Current portion of lease obligations - Finance leases	0	60
Deferred revenue	1,903	57
Total current liabilities	18,944	15,388
Deferred revenue, net of current portion	3,142	1,987
Long-term lease obligations - Operating leases	23,665	24,951
Other long-term liabilities	1,246	1,230
Total liabilities	46,997	43,556
Commitments and Contingencies (Note 11)
Stockholders' equity:
Preferred stock, $0.0001 par value per share; 5,000 shares authorized, none issued and outstanding	0	0
Common stock, $0.0001 par value per share; 100,000 shares authorized; 59,125 shares and 58,877 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	6	6
Additional paid-in capital	451,185	447,920
Accumulated deficit	(356,405)	(342,409)
Total stockholders' equity	94,786	105,517
Total liabilities and stockholders' equity	$ 141,783	$ 149,073