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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 3 Months Ended 6 Months Ended
Jun. 25, 2016
Jun. 27, 2015
Jun. 25, 2016
Jun. 27, 2015
Cash flows from operating activities:        
Net (loss) income $ (2,784,728) $ 706,280 $ (9,603,516) $ (3,106,803)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:        
Depreciation and amortization     651,687 1,190,413
Accretion (amortization) of premium or discount on marketable debt securities     78,261 302,466
Stock-based compensation     951,053 2,022,043
Foreign currency losses (gains)     563,548 (280,173)
Provision for Doubtful Accounts     (17,644) 74,500
Deferred Income Tax Expense (Benefit)     1,363,000 0
Gain (Loss) on Disposition of Property Plant Equipment (7,700,522) 0 (7,700,522) 0
Gain on sale of investments 0 (5,460,399) 0 (7,602,820)
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities     244,956 1,130,162
Changes in assets and liabilities:        
Accounts receivable     145,076 (4,388,730)
Inventory     (696,705) (110,325)
Increase (Decrease) in Prepaid Expense and Other Assets     (295,257) (177,843)
Accounts payable and accrued expenses     1,682,820 (1,351,835)
Billings in excess of revenue earned     (152,872) 3,085,945
Net cash used in operating activities     (12,195,601) (8,857,314)
Cash flows from investing activities:        
Other assets     (187,646) (8,486)
Capital expenditures     (305,059) (651,814)
Proceeds from sale of marketable debt securities     30,488,413 12,000,622
Purchase of marketable debt securities     (35,064,288) (7,777,277)
Proceeds from sale of investments     0 7,330,203
Proceeds from Sale of Buildings     8,106,819 0
Proceeds from Divestiture of Businesses     15,000,000 0
Net cash provided by investing activities     18,038,239 10,893,248
Net cash used in financing activities        
Proceeds from Stock Options Exercised     0 86,048
Settlements of restricted stock for tax withholding obligations     (1,500) (183,259)
Net cash used in financing activities     (1,500) (97,211)
Effect of exchange rate changes on cash     203,402 (97,023)
Net increase in cash and equivalents     6,044,540 1,841,700
Cash and equivalents:        
Beginning of period   16,477,501 19,767,889 $ 14,635,801
End of period 25,812,429   $ 25,812,429  
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 0 228,000    
Non cash proceeds from exercise of warrants $ 0 $ 1,330,000,000