Stockholders' Equity (Narrative) (Details) - USD ($)					12 Months Ended
	Nov. 25, 2019	Jul. 31, 2018	Jun. 01, 2018	Sep. 14, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2003	Dec. 31, 2017
Class Of Stock [Line Items]
Common stock, shares authorized					300,000,000	300,000,000
Common stock, par value					$ 0.01	$ 0.01
Preferred stock, shares authorized					10,000,000	10,000,000
Preferred stock, par value					$ 10.00	$ 10.00
Options, Exercised (in shares)					31,276	173,130
Convertible Preferred Stock, Shares Issuable upon Conversion					The Company’s shares of Series N preferred stock, each of which is convertible to 40 common shares, have the right to receive dividends or dividend equivalents should the Company declare dividends on its common stock
Series N preferred stock, each convertible to common shares					40
Series N preferred shares, conversion price per share					$ 1,000
Term of Stock-Based Compensation Plan					6 years 9 months 18 days	3 years 2 months 12 days
Exercise Price, Outstanding					$ 0.51	$ 0.75						$ 0.97
Options to purchase, Granted (in shares)					649,850	526,500
Exercise price, options granted in period					$ 0.74	$ 0.43
Options, Expired					765,000	1,016,870
Stock-based compensation expense					$ 283,000	$ 289,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares					1,454,514	1,770,200
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value					$ 0.39	$ 0.31
Unrecognized stock-based compensation					$ 500,000
Unrecognized stock-based compensation, Period for recognition					2 years 6 months
Fair Value of Options Vested in Period					$ 300,000	$ 300,000
Aggregate intrinsic value of exercisable options					$ 1,200,000	$ 11,000
Other Options Issued [Member]
Class Of Stock [Line Items]
Options to purchase, Granted (in shares)					265,000			625,000
Options, Expired					625,000	0
Stock Options [Member] | Selling, General and Administrative Expenses [Member]
Class Of Stock [Line Items]
Stock-based compensation expense					$ 300,000	$ 300,000
Restricted Stock [Member]
Class Of Stock [Line Items]
Unrecognized stock-based compensation expense					$ 200,000	$ 200,000
Minimum [Member] | Other Options Issued [Member]
Class Of Stock [Line Items]
Exercise price, options granted in period					$ 0.70
Maximum [Member] | Other Options Issued [Member]
Class Of Stock [Line Items]
Exercise price, options granted in period					$ 0.85
Employees [Member] | NLEX [Member]
Class Of Stock [Line Items]
Options, Exercised (in shares)						173,130
Options to purchase, Granted (in shares)			300,000
Options, Expired		126,870
2003 Stock Option and Appreciation Rights Plan [Member]
Class Of Stock [Line Items]
Number of Shares Authorized for Stock-Based Compensation Plan											2,000,000
Term of Stock-Based Compensation Plan											10 years
Stock Option Award Vesting Period											4 years
Exercise Price, Outstanding											$ 1.00
Options to purchase, Granted (in shares)					0
Options, Expired					140,000	660,000
2010 Non-Qualified Stock Option Plan [Member]
Class Of Stock [Line Items]
Number of Shares Authorized for Stock-Based Compensation Plan										1,250,000
Stock Option Award Vesting Period										4 years
Options to purchase, Granted (in shares)					60,000	85,000
2010 Non-Qualified Stock Option Plan [Member] | Minimum [Member]
Class Of Stock [Line Items]
Exercise Price, Outstanding										$ 0.24
2010 Non-Qualified Stock Option Plan [Member] | Maximum [Member]
Class Of Stock [Line Items]
Exercise Price, Outstanding										$ 0.70
2010 Non-Qualified Stock Option Plan [Member] | Directors [Member] | Annual Compensation Plan [Member]
Class Of Stock [Line Items]
Options to purchase, Granted (in shares)					60,000	85,000
Equity Partners Stock Option Plan [Member]
Class Of Stock [Line Items]
Number of Shares Authorized for Stock-Based Compensation Plan									230,000
Options to purchase, Granted (in shares)									230,000
Exercise price, options granted in period									$ 1.83
Options, Expired						230,000
2016 Stock Option Plan [Member]
Class Of Stock [Line Items]
Options, Exercised (in shares)					31,276	173,130
Number of Shares Authorized for Stock-Based Compensation Plan				3,150,000
Stock Option Award Vesting Period				4 years
Options to purchase, Granted (in shares)					324,850	441,500	2,539,200
Options, Expired					0	126,870
2016 Stock Option Plan [Member] | Minimum [Member]
Class Of Stock [Line Items]
Exercise Price, Outstanding				$ 0.45
2016 Stock Option Plan [Member] | Maximum [Member]
Class Of Stock [Line Items]
Exercise Price, Outstanding				$ 0.85
Common Stock [Member]
Class Of Stock [Line Items]
Options, Exercised (in shares)					10,783	173,130
Issuance of restricted common stock, shares						600,000
Share price					$ 25.00
Series N preferred stockholders to liquidation preference, conversion price per share					$ 1,000
Preferred Stock [Member]
Class Of Stock [Line Items]
Convertible Preferred Stock, Shares Issuable upon Conversion					Each share of Series N preferred stock has a voting entitlement equal to 40 common shares, votes with the common stock on an as-converted basis and is senior to all other preferred stock of the Company. Dividends, if any, will be paid on an as-converted basis equal to common stock dividends. The conversion value of each share of Series N preferred stock is $1,000, and each share is convertible to 40 common shares at the rate of $25.00 per common share. The holders of shares of Series N preferred stock are entitled to liquidation preference over common stockholders equivalent to $1,000 per share.
Conversion of series N preferred stock to shares of common stock					0	0
Maxim Group LLC [Member]
Class Of Stock [Line Items]
Stock issued, for Services, Shares	75,000
David Ludwig And Tom Ludwig [Member]
Class Of Stock [Line Items]
Issuance of restricted common stock, shares			600,000
David Ludwig And Tom Ludwig [Member] | Restricted Stock [Member]
Class Of Stock [Line Items]
Stock-based compensation expense					$ 52,000	$ 30,000
Shares restriction term of service			5 years
Weighted average grant date fair value						$ 0.43