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Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Operating activities    
Net loss $ (12,156) $ (6,265)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:    
Depreciation 59 50
Deferred income taxes (80)   
Stock-based compensation 3,563 2,091
Loss on disposal of property    37
Equity in the net loss of AMSO, LLC    1,935
Change in assets and liabilities:    
Restricted cash 4,014 (1,069)
Trade accounts receivable 12,999 5,431
Inventory (1,374) 791
Prepaid expenses 195 2,076
Other current assets and other assets 330 (170)
Trade accounts payable, accrued expenses and other current liabilities (11,656) (3,000)
Advances from customers (880) (997)
Due to IDT Corporation (286) (300)
Income taxes payable (1,830) 753
Net cash (used in) provided by operating activities (7,102) 1,363
Investing activities    
Capital expenditures (766) (77)
Capital contributions to AMSO, LLC    (1,825)
Payment for acquisition (574)   
Issuance of note receivable (50) (125)
Purchases of certificates of deposit    (3,000)
Proceeds from maturities of certificates of deposit 2,600   
Proceeds from maturities and sale of marketable securities    6,531
Net cash provided by investing activities 1,210 1,504
Financing activities    
Dividends paid (611) (521)
Proceeds from exercise of stock options 27 53
Advance on sale of interest in subsidiary 300   
Repurchases of Class B common stock from employees    (126)
Net cash used in financing activities (284) (594)
Effect of exchange rate changes on cash and cash equivalents 87 141
Net (decrease) increase in cash and cash equivalents (6,089) 2,414
Cash and cash equivalents at beginning of period 73,885 69,409
Cash and cash equivalents at end of period $ 67,796 $ 71,823