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Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Operating activities    
Net loss $ (4,223) $ (3,595)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:    
Depreciation 80 91
Deferred income taxes    4,587
Stock-based compensation 3,155 2,614
Loss on disposal of property 37   
Equity in the net loss of AMSO, LLC 2,607 2,252
Change in assets and liabilities:    
Restricted cash (665) 280
Trade accounts receivable 1,799 (9,567)
Inventory (834) 1,296
Prepaid expenses 651 1,264
Other current assets and other assets (950) (1,084)
Trade accounts payable, accrued expenses and other current liabilities (2,556) 4,508
Advances from customers (399) 398
Due to IDT Corporation (78) (182)
Income taxes payable 693 (1,709)
Net cash (used in) provided by operating activities (683) 1,153
Investing activities    
Capital expenditures (300) (64)
Capital contributions to AMSO, LLC (2,345) (2,925)
Issuance of note receivable (375) (650)
Purchases of licenses and security deposit    (175)
Purchases of certificates of deposit (5,330) (2,205)
Proceeds from maturities of certificates of deposit 2,205   
Purchase of marketable securities (3) (11,484)
Proceeds from maturities and sale of marketable securities 10,033   
Net cash provided by (used in) investing activities 3,885 (17,503)
Financing activities    
Increase in restricted cash    (10,010)
Dividends paid (826) (4,205)
Proceeds from exercise of stock options 53 5
Repurchases of Class B common stock from employees (270) (133)
Net cash used in financing activities (1,043) (14,343)
Effect of exchange rate changes on cash and cash equivalents 279 (8)
Net increase (decrease) in cash and cash equivalents 2,438 (30,701)
Cash and cash equivalents at beginning of period 69,409 102,220
Cash and cash equivalents at end of period $ 71,847 $ 71,519