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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 3 Months Ended
Mar. 26, 2016
Mar. 28, 2015
Cash flows from operating activities:    
Net loss $ (6,818,788) $ (3,813,086)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:    
Depreciation and amortization 335,478 681,899
Accretion (amortization) of premium or discount on marketable debt securities 37,971 20,645
Stock-based compensation 56,454 997,464
Foreign currency losses 535,294 137,074
Provision for Doubtful Accounts 0 (74,500)
Deferred Income Tax Expense (Benefit) 123,000 0
Gain on sale of investments 0 (2,142,421)
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities 94,050 548,627
Changes in assets and liabilities:    
Accounts receivable (123,073) (696,222)
Inventory (306,431) (140,810)
Increase (Decrease) in Prepaid Expense and Other Assets (491,455) (168,651)
Accounts payable and accrued expenses 98,847 (3,071,919)
Billings in excess of revenue earned (77,580) 1,907,449
Net cash used in operating activities (5,553,323) (5,477,149)
Cash flows from investing activities:    
Other assets (92,276) (8,250)
Capital expenditures (223,520) (314,400)
Proceeds from sale of marketable debt securities 11,229,734 3,805,945
Purchase of marketable debt securities (13,474,384) (2,073,061)
Proceeds from sale of investments 0 1,869,804
Proceeds from Sale of Buildings 791,623 0
Proceeds from Divestiture of Businesses 15,000,000 0
Net cash provided by investing activities 13,231,177 3,280,038
Net cash used in financing activities    
Settlements of restricted stock for tax withholding obligations (1,500) 0
Net cash used in financing activities (1,500) 0
Effect of exchange rate changes on cash 191,088 22,246
Net increase (decrease) in cash and equivalents 7,867,442 (2,174,865)
Cash and equivalents:    
Beginning of period 19,767,889 14,635,801
End of period 27,635,331 12,460,936
Supplemental disclosure of cash flow information:    
Income taxes paid 0 50,000
Supplemental schedule of noncash investing activities:    
Construction in progress included in accrued expenses 136,000 150,000
Non cash proceeds from exercise of warrants $ 0 $ 1,330,000,000