Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Stockholders' Equity Note [Abstract]

Summary of Stock-Based Compensation Expense

Year ended December 31	2016		2015
Cost of sales	$	28,000	$	34,000
Selling		52,000		69,000
Marketing		1,000		15,000
General and administrative		123,000		235,000
	$	204,000	$	353,000

Schedule of Weighted Average Assumptions

	2016			2015
Stock Options:
Expected life (years)		2.5			3.4
Expected volatility		41	%		45	%
Dividend yield		0	%		0	%
Risk-free interest rate		1.0	%		1.2	%
		2016			2015
Stock Purchase Plan Options:
Expected life (years)		1.0			1.0
Expected volatility		31	%		37	%
Dividend yield		0	%		0	%
Risk-free interest rate		0.6	%		0.3	%

Summary of Activity Under Stock Option Plans

	Plan Shares Available for Grant			Plan Options Outstanding			Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value
Balance at January 1, 2015		307,767			1,255,077		$	2.86
Shares reserved		200,000			—
Stock awards granted		( 37,233	)		—
Restricted stock units granted		( 99,000	)		—
Stock options granted		( 200,000	)		200,000			2.82
Stock options exercised		—			( 113,837	)		1.90	$	105,012
Cancelled or forfeited - 2013 Plan options		279,000			( 279,000	)		2.87
Cancelled or forfeited - 2013 Plan   restricted stock units		27,000			—			2.89
Cancelled or forfeited - 2003 Plan options		—			( 167,079	)		4.13
Balance at December 31, 2015		477,534			895,161			2.73
Shares reserved		—			—
Stock awards granted		( 54,036	)		—
Restricted stock units and awards granted		( 189,875	)		—
Stock options granted		( 20,000	)		20,000			2.90
Stock options exercised		—			( 227,833	)		1.72	$	143,531
Cancelled or forfeited - 2013 Plan options		237,500			( 237,500	)		2.86
Cancelled or forfeited - 2013 Plan   restricted stock and restricted stock units		50,499			—			2.72
Cancelled or forfeited - 2003 Plan options		—			( 30,666	)		3.22
Balance at December 31, 2016		501,622			419,162		$	3.18

Schedule Of The Number Of Options Exercisable

December 31, 2016	381,836
December 31, 2015	653,840

Summary Of Information About Stock Options Outstanding

		Options Outstanding											Options Exercisable
Ranges of Exercise Prices		Number Outstanding			Weighted Average Remaining Contractual Life						Weighted Average Exercise Price Per Share		Number Exercisable			Weighted Average Exercise Price Per Share
$	1.61 - $2.79		107,830			5.42		years	$	1.79		107,830		$	1.79
$	2.80 - $4.22		262,832			6.26		years		3.32		225,506			3.37
$	5.49		48,500	years			5.49			48,500		5.49
			419,162			5.72		years	$	3.18		381,836		$	3.19

Summary of Restricted Stock and Restricted Stock Units

	Number of Shares			Weighted average grant date fair value
Unvested shares at January 1, 2015		25,000		$	3.03
Granted		99,000			2.71
Vested		(8,334	)		3.03
Forfeited or surrendered		(27,000	)		2.89
Unvested shares at December 31, 2015		88,666			2.72
Granted		189,875			2.11
Vested		(23,167	)		2.68
Forfeited or surrendered		(50,499	)		2.72
Unvested shares at December 31, 2016		204,875		$	2.16