CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Cash flows from operating activities:
Net loss	$ (28,670,789)us-gaap_ProfitLoss	$ (5,606,016)us-gaap_ProfitLoss	$ (18,994,272)us-gaap_ProfitLoss
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	3,002,014us-gaap_DepreciationAndAmortization	3,646,725us-gaap_DepreciationAndAmortization	9,111,943us-gaap_DepreciationAndAmortization
Accretion (amortization) of premium or discount on marketable debt securities	53,437	360,403	(287,439)
Stock-based compensation	4,827,772us-gaap_ShareBasedCompensation	4,203,408us-gaap_ShareBasedCompensation	4,486,990us-gaap_ShareBasedCompensation
Net gain on investment transactions	0us-gaap_GainLossOnSaleOfInvestments	(1,899,291)us-gaap_GainLossOnSaleOfInvestments	(856,170)us-gaap_GainLossOnSaleOfInvestments
Losses in unconsolidated affiliates	102,305kopn_Lossesinunconsolidatedaffiliates	625,098kopn_Lossesinunconsolidatedaffiliates	679,587kopn_Lossesinunconsolidatedaffiliates
Goodwill and Intangible Asset Impairment	0	1,511,414	1,704,770
Gain (Loss) on Sale of Business	0us-gaap_GainLossOnSaleOfBusiness	(33,452,176)us-gaap_GainLossOnSaleOfBusiness	0us-gaap_GainLossOnSaleOfBusiness
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	283,333	0	0
Deferred income taxes	(230,725)	252,687	2,162,246
Foreign Currency Transaction Gain (Loss), before Tax	(96,819)	341,590	1,236,194
Loss on remeasurement of investment in Intoware	0	0	557,594
Asset Impairment Charges	1,319,287us-gaap_AssetImpairmentCharges	5,000,442us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges
Change in allowance for bad debt	63,340	(107,694)	(129,370)
Change in warranty reserves	489,332us-gaap_OtherNoncashIncomeExpense	733,428us-gaap_OtherNoncashIncomeExpense	402,938us-gaap_OtherNoncashIncomeExpense
Changes in assets and liabilities:
Accounts receivable	(1,286,407)	4,853,073	4,363,447
Inventory	(1,520,824)us-gaap_IncreaseDecreaseInInventories	2,262,547us-gaap_IncreaseDecreaseInInventories	3,466,568us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets	191,367	(179,858)	126,580
Accounts payable and accrued expenses	1,829,591	(773,471)	(2,996,339)
Billings in excess of revenue earned	38,790	(672,714)	(1,247,066)
Net cash (used in) provided by operating activities	(19,604,996)	(18,900,405)	3,788,201
Cash flows from investing activities:
Proceeds from sale of marketable debt securities	39,801,276	17,130,488	37,305,871
Purchase of marketable debt securities	(19,867,896)	(49,329,891)	(39,853,837)
Proceeds from Divestiture of Businesses, Net of Cash Divested	0	55,188,020	0
Cash included in current assets held for sale	0	0	(2,388,812)
Purchases of cost based investment	0us-gaap_PaymentsToAcquireInvestments	(3,583,611)us-gaap_PaymentsToAcquireInvestments	(2,249,784)us-gaap_PaymentsToAcquireInvestments
Proceeds from sale of investments	0	2,597,289	856,170
Other assets	(38,134)	(10,552)	43,564
Proceeds from Sale of Machinery and Equipment	250,000	0	0
Capital expenditures	(1,489,986)	(741,543)	(9,831,967)
Net cash provided by (used in) investing activities	18,655,260	21,461,684	(15,930,572)
Cash flows from financing activities:
Treasury stock purchases	(298,619)	(7,991,954)	(3,455,529)
Purchase of noncontrolling interest in Kowon	0		0
Payments to Noncontrolling Interests		(3,662,400)us-gaap_PaymentsToMinorityShareholders
Settlements of restricted stock for tax withholding obligations	(975,869)	(1,192,346)	(628,634)
Proceeds from exercise of stock options	137,813	0	0
Net cash used in financing activities	(1,136,675)	(12,846,700)	(4,084,163)
Effect of exchange rate changes on cash	(34,454)	(93,300)	266,758
Net decrease in cash and equivalents	(2,120,865)	(10,378,721)	(15,959,776)
Cash and equivalents:
Beginning of year	16,756,666	27,135,387	43,095,163
End of year	14,635,801	16,756,666	27,135,387
Supplemental disclosure of cash flow information:
Income taxes paid		95,000us-gaap_IncomeTaxesPaid	75,000us-gaap_IncomeTaxesPaid
Supplemental schedule of noncash investing activities:
Income Taxes Paid, Net	(18,000)us-gaap_IncomeTaxesPaidNet
Construction in progress included in accrued expenses	373,000	105,000	360,000
Notes Receivable, Fair Value Disclosure	0	14,866,000	0
Intoware
Cash flows from investing activities:
Cash paid to acquire Intoware and FDD, net of cash acquired	0	0	188,223
eMDT
Cash flows from investing activities:
Payments to Acquire Business Three, Net of Cash Acquired	$ 0	$ 211,484	$ 0

Total increases or decreases in allowance for bad debt.

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The cash outflow to reacquire common stock during the period.

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Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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The cash outflow to acquire debt securities classified as available-for-sale securities, because they are not classified as either held-to-maturity securities or trading securities.

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The cash outflow associated with a third acquisition of a business, net of the cash acquired from the purchase.

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The cash inflow associated with the sale of debt securities classified as available-for-sale securities.

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The cash inflow from sale of machinery and equipment.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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