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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 3 Months Ended
Apr. 01, 2017
Mar. 26, 2016
Cash flows from operating activities:    
Net loss $ (7,939,879) $ (6,834,788)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:    
Depreciation and amortization 443,174 335,478
Accretion (amortization) of premium or discount on marketable debt securities 27,256 37,971
Stock-based compensation 1,292,105 56,454
Foreign currency losses 1,190,199 485,294
Adjustment of Warrants Granted for Services (274,000) 0
Deferred Income Tax Expense (Benefit) (1,168,962) 123,000
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities 129,884 94,050
Changes in assets and liabilities:    
Accounts receivable (210,823) (123,073)
Inventory (249,340) (306,431)
Increase (Decrease) in Prepaid Expense and Other Assets 22,082 (541,455)
Accounts payable and accrued expenses 10,736 98,847
Billings in excess of revenue earned 152,797 (77,580)
Net cash used in operating activities (6,618,935) (5,569,323)
Cash flows from investing activities:    
Other assets (12,346) (92,276)
Capital expenditures (297,983) (223,520)
Proceeds from sale of marketable debt securities 13,519,291 11,229,734
Purchase of marketable debt securities (948,637) (13,474,384)
Increase (Decrease) in Assets Held-for-sale 0 (791,623)
Business Combination, Consideration Transferred (3,247,397) 0
Proceeds from Divestiture of Businesses 0 15,000,000
Net cash provided by investing activities 9,012,928 13,231,177
Net cash used in financing activities    
Settlements of restricted stock for tax withholding obligations 0 (1,500)
Net cash used in financing activities 0 (1,500)
Effect of exchange rate changes on cash 176,578 191,088
Net increase in cash and equivalents 2,570,571 7,851,442
Cash and equivalents:    
Beginning of period 15,822,495 19,767,889
End of period 18,393,066 27,619,331
Supplemental schedule of noncash investing activities:    
Construction in progress included in accrued expenses $ 0 $ 136,000