CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013	Dec. 31, 2011	Dec. 29, 2012
Cash flows from operating activities:
Net loss	$ (14,843,067)	$ (28,670,789)	$ (5,606,016)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,138,982	3,002,014	3,646,725
Accretion of premium or discount on marketable debt securities	168,217	53,437	360,403
Stock-based compensation	3,145,479	4,827,772	4,203,408
Net gain on investment transactions	(9,206,919)	0	(1,899,291)
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	180,715	0	0
Losses in unconsolidated affiliates	0	102,305	625,098
Goodwill and Intangible Asset Impairment	0	0	1,511,414
Gain (Loss) on Sale of Business	0	0	(33,452,176)
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	0	283,333	0
Deferred income taxes	(75,000)	(230,725)	252,687
Foreign Currency Transaction Gain (Loss), before Tax	(455,614)	(96,819)	341,590
Asset Impairment Charges	0	1,319,287	5,000,442
Change in allowance for bad debt	(112,500)	63,340	(107,694)
Change in warranty reserves	1,560,259	489,332	733,428
Extended Product Warranty Accrual, Preexisting Increase (Decrease)	(200,000)		0	$ 0
Changes in assets and liabilities:
Accounts receivable	2,850,942	(1,286,407)	4,853,073
Inventory	(8,484)	(1,520,824)	2,262,547
Prepaid expenses and other current assets	(207,421)	191,367	(179,858)
Accounts payable and accrued expenses	(2,632,385)	1,829,591	(773,471)
Billings in excess of revenue earned	777,247	38,790	(672,714)
Net cash used in operating activities	(16,919,549)	(19,604,996)	(18,900,405)
Cash flows from investing activities:
Proceeds from sale of marketable debt securities	38,055,759	39,801,276	17,130,488
Purchase of marketable debt securities	(22,835,740)	(19,867,896)	(49,329,891)
Proceeds from sale of investments	9,206,919	0	2,597,289
Proceeds from Sale of Machinery and Equipment	0	250,000	0
Proceeds from Divestiture of Businesses, Net of Cash Divested	0	0	55,188,020
Payments to Acquire Business Three, Net of Cash Acquired	0	0	211,484
Purchases of cost based investment	0	0	(3,583,611)
Other assets	(1,772)	(38,134)	(10,552)
Capital expenditures	(1,122,808)	(1,489,986)	(741,543)
Net cash provided by investing activities	23,302,358	18,655,260	21,461,684
Cash flows from financing activities:
Treasury stock purchases	0	(298,619)	(7,991,954)
Purchase of noncontrolling interest in Kowon	0	0	(3,662,400)
Proceeds from exercise of stock options and warrants	86,047	137,813	0
Settlements of restricted stock for tax withholding obligations	(1,072,385)	(975,869)	(1,192,346)
Net cash used in financing activities	(986,338)	(1,136,675)	(12,846,700)
Effect of exchange rate changes on cash	(264,383)	(34,454)	(93,300)
Net decrease in cash and equivalents	5,132,088	(2,120,865)	(10,378,721)
Cash and equivalents:
Beginning of year	14,635,801		16,756,666
End of year	19,767,889	14,635,801		$ 27,135,387
Supplemental schedule of noncash investing activities:
Income Taxes Paid, Net	50,000	(18,000)	95,000
Construction in progress included in accrued expenses	0	373,000	$ 105,000
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds	$ 0	$ 0			$ 14,866,000,000