CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 196,135	$ 193,822
Accounts receivable, less reserve for doubtful accounts of $226 and $227 at March 31, 2019 and December 31, 2018, respectively	39,341	33,015
Royalties and other receivables	21	136
Unbilled receivables		2,602
Inventories, net	44,920	42,263
Prepaid expenses and other current assets	3,660	3,901
Total current assets	284,077	275,739
Property, plant and equipment, net	34,526	32,180
Intangible assets, net	132,648	135,438
Goodwill	326,395	326,735
Deferred tax assets	3,917	4,355
Operating lease right of use assets	16,185
Other assets	173	174
Total assets	797,921	774,621
Current liabilities:
Accounts payable	9,823	10,489
Operating lease liability	3,100
Accrued liabilities	12,760	15,865
Convertible senior notes, current portion	104,595	103,488
Total current liabilities	130,278	129,842
Deferred tax liabilities	25,097	25,086
Operating lease liability, long-term	17,088
Other liabilities, long-term	433	4,125
Total liabilities	172,896	159,053
Commitments and contingencies (Note 9)
Stockholders' equity:
Preferred stock, $.01 par value, 5,000,000 shares authorized, no shares issued or outstanding
Common stock, $0.01 par value; 80,000,000 shares authorized; 44,073,998 shares at March 31, 2019 and 43,917,378 shares at December 31, 2018 issued and outstanding	441	439
Additional paid-in capital	645,883	642,590
Accumulated other comprehensive loss	(13,784)	(11,893)
Accumulated deficit	(7,515)	(15,568)
Total stockholders' equity	625,025	615,568
Total liabilities and stockholders' equity	$ 797,921	$ 774,621