RELATED PARTY - STRATEGIC ALLIANCE AND INVESTMENT BY ELUTIONS, INC. (Details Textual)			12 Months Ended
	Mar. 18, 2014 USD ($) $ / shares shares	Feb. 25, 2014	Dec. 30, 2017 USD ($) employee $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Jan. 03, 2015 USD ($)	Jan. 31, 2017 USD ($)
Investment [Line Items]
Aggregate original principal amount	$ 3,268,664
Outstanding shares (percent)			6.50%
Ownership (percent)			38.50%
Price per share of stock on tracking warrant (in dollars per share) | $ / shares			$ 5.50
Investment agreement, inventory required to be sold within one year of agreement to avoid discount (percent)		75.00%
Investment agreement, inventory discount against original purchase price (percent)		10.00%
Number of full-time equivalent employees | employee			3
Due to employees, per month			$ 36,750
Cost of dedicated employees				$ 98,500
Estimated license payments			700,000			$ 400,000
Due from Elutions, Inc.			$ 400,000
Interest on advance payments (percent)			5.50%
Payments under subcontract			$ 291,000	291,000
Amount deducted at time of payment			112,000	112,000
Carrying value of note			$ 3,269,000	3,269,000
Non Convertible Promissory Note [Member]
Investment [Line Items]
Stated interest rate (percent)			7.825%
Fair value of note			$ 2,636,000	$ 2,703,000
Non Convertible Promissory Note [Member] | Strategic Alliance and Investment [Member]
Investment [Line Items]
Aggregate original principal amount			$ 3,268,664
Common Stock [Member]
Investment [Line Items]
Shares issued, price per share (in dollars per share) | $ / shares	$ 3.28
Incentive Warrant [Member]
Investment [Line Items]
Warrants issued to purchase common stock (in shares) | shares			3,400,000
Number of shares vested under the Incentive Warrant | shares			20,911	27,194
Expense related to shares vested under Incentive Warrant			$ 57,000	$ 53,000
Incentive Warrant [Member] | Non Convertible Promissory Note [Member]
Investment [Line Items]
Debt instrument maturity date			Mar. 18, 2019
Warrant vesting period			5 years
Revenues recognized for vesting of warrants (percent)			4.00%
Cash recognized or received in period for warrant vesting (percent)			4.00%
Elutions, Inc [Member]
Investment [Line Items]
Due from Elutions, Inc.			$ 100,000	200,000
Elutions, Inc [Member] | Inventories [Member]
Investment [Line Items]
Purchase obligation			$ 3,000,000.0
Payment to acquire inventory					$ 3,000,000.0
Elutions, Inc [Member] | Minimum [Member]
Investment [Line Items]
Exercise price of warrants (in dollars per share) | $ / shares			$ 3.85
Elutions, Inc [Member] | Maximum [Member]
Investment [Line Items]
Exercise price of warrants (in dollars per share) | $ / shares			$ 4.85
Elutions, Inc [Member] | Non Convertible Promissory Note [Member]
Investment [Line Items]
Debt instrument maturity date			Mar. 18, 2019
Debt default interest rate (percent)			9.825%
Interest expense			$ 254,000	$ 259,000
Carrying value of note			$ 3,269,000
Elutions, Inc [Member] | Common Stock [Member]
Investment [Line Items]
Shares issued and sold (in shares) | shares	609,756
Aggregate purchase price of shares issued	$ 2,000,000
Elutions, Inc [Member] | Tracking Warrant [Member]
Investment [Line Items]
Warrants issued to purchase common stock (in shares) | shares			996,544
Warrants issued during period, exercise price (in dollars per share) | $ / shares			$ 3.28
Warrants issued during period, expiration date			Mar. 18, 2020
Price per share of stock on tracking warrant (in dollars per share) | $ / shares				$ 5.50
Period after which issuer may require holder to exercise or forfeit warrant if working capital thresholds are met			30 months
Elutions, Inc [Member] | Tracking Warrant [Member] | Strategic Alliance and Investment [Member]
Investment [Line Items]
Warrants issued to purchase common stock (in shares) | shares			996,544
Warrants issued during period, exercise price (in dollars per share) | $ / shares			$ 3.28	$ 3.28
Elutions, Inc [Member] | Incentive Warrant [Member]
Investment [Line Items]
Warrants issued to purchase common stock (in shares) | shares			3,400,000
Warrants issued during period, expiration date			Mar. 18, 2020
Warrants issued during period, exercise price increases per year (in dollars per share) | $ / shares			$ 0.25
Elutions, Inc [Member] | Incentive Warrant [Member] | Minimum [Member]
Investment [Line Items]
Exercise price of warrants (in dollars per share) | $ / shares			3.85
Elutions, Inc [Member] | Incentive Warrant [Member] | Maximum [Member]
Investment [Line Items]
Exercise price of warrants (in dollars per share) | $ / shares			$ 4.85
Elutions, Inc [Member]
Investment [Line Items]
Contract, term of agreement		5 years
Contract, renewal period		2 years
Other Current Assets [Member] | Elutions, Inc [Member]
Investment [Line Items]
Due from Elutions, Inc.				$ 100,000
Other Noncurrent Assets [Member] | Elutions, Inc [Member]
Investment [Line Items]
Due from Elutions, Inc.				$ 100,000