CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 56,054	$ 68,330
Short-term investments	44,638	35,068
Accounts receivable (net of allowance for doubtful accounts of $40 and $40, respectively)	33,664	37,437
Inventory	15,929	13,381
Other current assets	4,809	4,246
Total current assets	155,094	158,462
Property and equipment, net	15,919	13,308
Restricted cash	6,184	211
Right-of-use assets	43,583	45,720
Long-term investments	23,718	25,687
Other long-term assets	317	317
Total assets	244,815	243,705
Current liabilities:
Accounts payable	9,684	9,016
Accrued expenses	12,133	14,045
Current portion of operating lease liabilities	3,156	2,950
Other current liabilities	41	41
Total current liabilities	25,014	26,052
Operating lease liabilities	44,964	47,147
Other long-term liabilities	21	44
Total liabilities	69,999	73,243
COMMITMENTS AND CONTINGENCIES
Shareholders’ equity:
Common stock, no par value; shares authorized — 75,000; shares issued and outstanding 47,141 and 46,880, respectively	575,011	553,902
Accumulated other comprehensive loss	(855)	(154)
Accumulated deficit	(399,340)	(383,286)
Total shareholders’ equity	174,816	170,462
Total liabilities and shareholders’ equity	$ 244,815	$ 243,705