CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 55,659	$ 68,330
Short-term investments	44,888	35,068
Accounts receivable (net of allowance for doubtful accounts of $40 and $40, respectively)	31,855	37,437
Inventory	14,385	13,381
Other current assets	5,093	4,246
Total current assets	151,880	158,462
Property and equipment, net	14,451	13,308
Restricted cash	6,184	211
Right-of-use assets	44,653	45,720
Long-term investments	22,803	25,687
Other long-term assets	317	317
Total assets	240,288	243,705
Current liabilities:
Accounts payable	7,750	9,016
Accrued expenses	10,793	14,045
Current portion of operating lease liabilities	3,147	2,950
Other current liabilities	41	41
Total current liabilities	21,731	26,052
Operating lease liabilities	46,053	47,147
Other long-term liabilities	19	44
Total liabilities	67,803	73,243
COMMITMENTS AND CONTINGENCIES
Shareholders’ equity:
Common stock, no par value; shares authorized — 75,000; shares issued and outstanding 47,081 and 46,880, respectively	563,475	553,902
Accumulated other comprehensive loss	(613)	(154)
Accumulated deficit	(390,377)	(383,286)
Total shareholders’ equity	172,485	170,462
Total liabilities and shareholders’ equity	$ 240,288	$ 243,705