Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF CASH FLOWS

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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Operating Activities      
Net income (loss) $ (13,252) $ (22,024) $ 10,114
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities:      
Amortization and depreciation 3,531 3,159 1,873
Amortization of investment premiums, net 1,058 1,179 1,258
Stock-based compensation 9,984 7,368 4,215
Deferred income taxes   6,668 (6,668)
Gain on sale of available-for-sale securities (2) (9)  
Write down of long-lived assets 184 150 36
Changes in operating assets and liabilities:      
Accounts receivable (4,137) (7,374) 6,660
Inventory (1,809) (657) (4,575)
Prepaid and other assets (129) 155 (1,458)
Accounts payable and accrued expenses 3,981 4,368 (2,295)
Amounts due to related party   (1,746) (762)
Accrued compensation 4,910 (51) 424
Deferred revenue and deferred profit (1,740) (1,293) (4,528)
Accrued price protection liability 5,024 2,400 358
Other long-term liabilities (59) 598 186
Net cash provided by (used in) operating activities 7,544 (7,109) 4,838
Investing Activities      
Purchases of property and equipment (5,055) (2,962) (2,960)
Purchases of intangibles (390) (201) (1,275)
Purchases of available-for-sale securities (87,897) (111,369) (111,807)
Maturities of available-for-sale securities 89,151 125,350 37,667
Net cash provided by (used in) investing activities (4,191) 10,818 (78,375)
Financing Activities      
Payments on capital leases (32) (82) (123)
Proceeds from issuance of common stock 2,531 2,815 1,743
Proceeds from initial public offering, net of costs     75,550
Repurchases of common stock (12,076)    
Net cash provided by (used in) financing activities (9,577) 2,733 77,170
Effect of exchange rate changes on cash and cash equivalents 8 21 9
Increase (decrease) in cash and cash equivalents (6,216) 6,463 3,642
Cash and cash equivalents at beginning of year 28,026 21,563 17,921
Cash and cash equivalents at end of year 21,810 28,026 21,563
Supplemental disclosures of cash flow information:      
Cash paid for interest 1 9 29
Cash paid for income taxes     382
Supplemental disclosures of non cash investing and financing information:      
Accrued purchase of property and equipment $ 52 $ 708 $ 554