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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Current assets    
Cash and cash equivalents $ 85,046 $ 36,707
Short-term marketable securities 46,750 57,424
Accounts receivable, net of allowance for doubtful accounts of $919 and $757 as of December 31, 2018 and December 31, 2017, respectively 59,155 51,503
Inventory 10,087 11,271
Prepaid expenses and other current assets 8,567 6,267
Income taxes receivable 5,757 1,832
Total current assets 215,362 165,004
Property and equipment, net 228,001 166,440
Goodwill 128,752 128,504
Other intangible assets, net 19,850 19,084
Long-term marketable securities 23,579 37,034
Other long-term assets 3,441 2,672
Total assets 618,985 518,738
Current liabilities    
Accounts payable 17,411 15,876
Accrued compensation 18,130 12,100
Accrued liabilities and other 16,702 8,408
Short-term debt obligations 5,000
Income taxes payable 491 2,371
Total current liabilities 52,734 43,755
Long-term income taxes payable 2,181
Long-term deferred tax liabilities 20,162 6,966
Other long-term liabilities 4,592 4,621
Total liabilities 77,488 57,523
Shareholders' equity    
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of December 31, 2018 and December 31, 2017, respectively
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 26,984,747 and 26,828,651 shares as of December 31, 2018 and December 31, 2017, respectively 27 27
Additional paid-in capital 258,502 241,725
Retained earnings 291,460 224,697
Accumulated other comprehensive loss (8,492) (5,234)
Total shareholders' equity 541,497 461,215
Total liabilities and shareholders' equity $ 618,985 $ 518,738