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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Cash flows from operating activities:      
Net income $ 20,058,000 $ 13,181,000 $ 23,969,000
Income (loss) from discontinued operations, net of tax 491,000 (7,848,000) (3,166,000)
Income from continuing operations 19,567,000 21,029,000 27,135,000
Adjustments to reconcile net income to net cash provided by operating activities from continuing operations:      
Depreciation and amortization 7,115,000 8,052,000 7,901,000
Realized (gain) on investment securities, net (458,000) (771,000) (74,000)
Share-based compensation 3,081,000 3,918,000 3,209,000
Deferred income taxes (106,000) 286,000 428,000
(Gain)/loss on disposal of fixed assets 81,000 (29,000) 392,000
Changes in assets and liabilities which provided (used) cash:      
Accounts receivable 17,000 (708,000) 87,000
Inventory 2,400,000 1,802,000 2,615,000
Prepaid expenses and other current assets (56,000) (349,000) 204,000
Other assets 292,000 (318,000) 746,000
Accounts payable and accrued expenses (2,363,000) (376,000) (1,427,000)
Income taxes 3,550,000 (5,198,000) 972,000
Net cash provided by operating activities- continuing operations 33,120,000 27,338,000 42,188,000
Net cash provided by (used in) operating activities- discontinued operations (3,709,000) (1,802,000) 172,000
Net cash provided by operating activities 29,411,000 25,536,000 42,360,000
Cash Flow from Investing Activities:      
Sale of investment securities 11,880,000 29,636,000 14,359,000
Purchase of investment securities (9,250,000) (26,080,000) (25,355,000)
Purchase of property and equipment (2,819,000) (7,024,000) (11,386,000)
Net cash used in investing activities- continuing operations (189,000) (3,468,000) (22,382,000)
Net cash provided by (used in) investing activities- discontinued operations 0 950,000 (220,000)
Net cash used in investing activities (189,000) (2,518,000) (22,602,000)
Cash Flow from Financing Activities:      
Repayment of long-term debt and capital leases (255,000) (222,000) (3,641,000)
Decrease in note receivable 45,000 52,000 26,000
Net shares repurchased for employee taxes (1,296,000) (1,152,000) 0
Options exercised by executives and directors 44,000 0 0
Excess tax benefits from share-based compensation 247,000 275,000 383,000
Purchase of treasury stock (10,516,000) (33,894,000) (20,081,000)
Net cash used in financing activities- continuing operations (11,731,000) (34,941,000) (23,313,000)
Net cash used in financing activities- discontinued operations 0 0 0
Net cash used in financing activities (11,731,000) (34,941,000) (23,313,000)
Foreign currency impact 87,000 0 0
NET CHANGE IN CASH AND CASH EQUIVALENTS 17,578,000 (11,923,000) (3,555,000)
Cash and cash equivalents - beginning of the period 24,459,000 36,382,000 39,937,000
Cash and cash equivalents - end of period 42,037,000 24,459,000 36,382,000
Supplemental disclosure of cash flow information:      
Interest paid 22,000 131,000 57,000
Income taxes paid $ 4,182,000 $ 12,721,000 $ 9,983,000