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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 8,892 $ 17,192
Marketable securities 5,785 3,200
Receivables, net of allowance for doubtful accounts of $71 and $129, respectively 9,658 9,378
Inventory, Net 13,280 12,278
Deferred income taxes 3,378 3,325
Prepaid expenses and other assets 3,270 2,693
Total current assets 44,263 48,066
Long-term marketable securities 19,666 22,326
Long-term inventories, net 992 551
Property and equipment, net 2,106 1,825
Intangibles, net 8,767 3,710
Goodwill 12,596 3,472
Deferred income taxes 1,303 1,024
Other assets 114 87
Total assets 89,807 81,061
Current liabilities:    
Accounts payable 2,852 2,730
Accrued liabilities 4,452 1,761
Deferred product revenue 4,980 4,158
Total current liabilities 12,284 8,649
Deferred rent 256 286
Other long-term liabilities 2,395 1,791
Total liabilities 14,935 10,726
Shareholders' equity:    
Common stock, par value $0.001, 50,000,000 shares authorized, 9,163,177 and 8,986,080 shares issued and outstanding 9 9
Additional paid-in capital 44,645 41,311
Accumulated other comprehensive income 83 23
Retained earnings 30,135 28,992
Total shareholders' equity 74,872 70,335
Total liabilities and shareholders' equity 89,807 81,061
Inventories [Member]
    
Current assets:    
Inventory, Net 11,673 10,758
Distributor Channel Inventory [Member]
    
Current assets:    
Inventory, Net $ 1,607 $ 1,520