ACCOUNTING STANDARDS (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 8,800,000		$ 8,800,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months		12 months
Revenues	$ (5,126,330)	$ (6,139,167)	$ (16,723,848)	$ (16,444,764)
Contract with Customer, Asset, Net	1,935,262		1,935,262		$ 3,555,137	$ 704,863
Inventory	(4,953,908)		(4,953,908)		(3,998,168)	(5,080,797)
Other assets	2,096,578		2,096,578		4,242,068	3,842,068
Total contract liabilities and billings in excess of revenue earned						1,555,883
Contract with Customer, Liability	(428,642)		(428,642)		(664,146)	(896,479)
Accumulated deficit	(261,631,136)		(261,631,136)		(237,062,519)	$ (240,121,901)
Research and development revenues	(1,482,711)	(549,765)	(3,563,341)	(1,942,819)
Net Income (Loss) Attributable to Parent	(9,791,383)	(8,247,422)	(24,568,618)	(23,437,834)
Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Asset, Net					2,850,274
Inventory					(1,082,629)
Other assets					400,000
Contract with Customer, Liability					(891,737)
Accumulated deficit					$ 3,059,382
Product [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	(3,643,619)	(5,589,402)	(13,160,507)	(14,501,945)
Research and development revenues	(1,482,711)		(3,563,341)
Cost of Goods and Services Sold	3,659,800	$ 4,144,884	11,219,741	$ 11,379,467
Net Income (Loss) Attributable to Parent	(9,791,383)		(24,568,618)
Product [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	(3,878,651)		(14,867,927)
Research and development revenues	(1,569,255)		(3,822,973)
Cost of Goods and Services Sold	3,497,549		11,997,670
Net Income (Loss) Attributable to Parent	(9,307,556)		(23,379,495)
Product [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	(235,032)		(1,707,420)
Research and development revenues	(86,544)		(259,632)
Cost of Goods and Services Sold	162,251		777,929
Net Income (Loss) Attributable to Parent	$ (483,827)		$ (1,189,123)
Transferred at Point in Time [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Percentage from Products and Services Transferred to Customers	63.00%	91.00%	63.00%	88.00%
Transferred over Time [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Percentage from Products and Services Transferred to Customers	37.00%	9.00%	37.00%	12.00%