Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 173,874	$ 75,715
Short-term investments	82,666	80,623
Accounts receivable, net of allowance for doubtful accounts of $3,915 and $2,666	25,918	36,948
Inventories	27,707	23,155
Prepaid expenses	2,745	2,433
Other current assets	5,054	5,676
Total current assets	317,964	224,550
Noncurrent Assets:
Property, plant and equipment, net	33,763	30,339
Operating right-of-use assets, net	4,938	4,996
Finance right-of-use assets, net	1,656	1,951
Intangible assets, net	15,221	14,674
Goodwill	35,244	36,201
Long-term investments	9,222	33,420
Other noncurrent assets	2,819	3,164
Total noncurrent assets	102,863	124,745
TOTAL ASSETS	420,827	349,295
Current Liabilities:
Accounts payable	9,057	9,567
Deferred revenue	4,917	3,713
Accrued expenses and other current liabilities	14,406	14,288
Finance lease liability	555	613
Operating lease liability	1,093	1,032
Acquisition-related contingent consideration obligation	560	3,500
Total current liabilities	30,588	32,713
Noncurrent Liabilities:
Finance lease liability	1,154	1,372
Operating lease liability	4,109	4,206
Other noncurrent liabilities	2,507	2,960
Deferred income taxes	712	899
Total noncurrent liabilities	8,482	9,437
TOTAL LIABILITIES	39,070	42,150
Commitments and contingencies (Note 9)
STOCKHOLDERS' EQUITY
Preferred stock, par value $.000001, 25,000 shares authorized, none issued
Common stock, par value $.000001, 120,000 shares authorized, 71,408 and 61,731 shares issued and outstanding	0	0
Additional paid-in capital	499,394	401,814
Accumulated other comprehensive loss	(17,282)	(12,136)
Accumulated deficit	(100,355)	(82,533)
Total stockholders' equity	381,757	307,145
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 420,827	$ 349,295