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CONSOLIDATED BALANCE SHEETS - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Current assets:    
Cash and cash equivalents $ 106,582,000 $ 79,641,000
Short-term investments 297,961,000 341,194,000
Accounts receivable, less reserves of $1,568 and $873 in 2017 and 2016, respectively 119,388,000 55,438,000
Unbilled revenue 7,454,000 2,217,000
Inventories 67,923,000 26,984,000
Prepaid expenses and other current assets 30,800,000 20,870,000
Total current assets 630,108,000 526,344,000
Long-term investments 423,441,000 324,335,000
Property, plant, and equipment, net 78,048,000 53,992,000
Goodwill 113,208,000 95,280,000
Intangible assets, net 13,189,000 8,312,000
Deferred income taxes 27,385,000 28,022,000
Other assets 2,491,000 2,319,000
Total assets 1,287,870,000 1,038,604,000
Current liabilities:    
Accounts payable 23,463,000 9,830,000
Accrued expenses 68,249,000 42,539,000
Accrued income taxes 11,391,000 5,193,000
Deferred revenue and customer deposits 9,969,000 8,211,000
Total current liabilities 113,072,000 65,773,000
Deferred income taxes 312,000 0
Reserve for income taxes 6,488,000 5,361,000
Accrued income taxes 66,741,000 0
Other non-current liabilities 5,904,000 4,871,000
Total liabilities 192,517,000 76,005,000
Commitments and contingencies (Note 10)
Shareholders’ equity (1):    
Common stock, $.002 par value – Authorized: 200,000 shares, issued and outstanding: 173,507 and 171,878 shares in 2017 and 2016, respectively 347,000 344,000
Additional paid-in capital 461,338,000 374,847,000
Retained earnings 668,267,000 643,836,000
Accumulated other comprehensive loss, net of tax (34,599,000) (56,428,000)
Total shareholders’ equity 1,095,353,000 962,599,000
Total liabilities and shareholders' equity $ 1,287,870,000 $ 1,038,604,000