Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Allowance for Doubtful Accounts Activity

The Company’s allowance for doubtful accounts activity for the years ended December 31, 2012 and 2011 was as follows:

	Year ended December 31,
	2012			2011
Balance at beginning of the year	$	149		$	206
Charged to costs and expenses	25			312
Deductions	(114		)	(369		)
Balance at end of the year	$	60		$	149

Deferred Revenue and Associated Cost of Goods Sold and Gross Profit

The details of deferred revenue and associated cost of goods sold and gross profit are as follows:

	As of December 31,
	2012		2011
Deferred revenue	$	3,593	$	3,404
Deferred cost of goods sold	1,289		1,199
Deferred gross profit	$	2,304	$	2,205

Changes in Warranty Accrual

The details of changes in the Company’s warranty accrual are as follows:

	Year ended December 31,
	2012			2011
Balance at the beginning of year	$	467		$	363
Accruals/additions	443			439
Usage/claims	(525		)	(335		)
Balance at end of year	$	385		$	467

Earnings Per Share

Earnings Per Share – The following table sets forth the computation of basic and diluted earnings per common share:

	Year ended December 31,
	2012		2011
Numerator:
Net income	$	26,647	$	6,929
Denominator:
Basic weighted average shares	9,107,234		9,027,934
Dilutive common stock equivalents using treasury stock method	107,451		243,877
Diluted weighted average shares	9,214,685		9,271,811
Basic earnings per common share:	$	2.93	$	0.77
Diluted earnings per common share:	$	2.89	$	0.75
Weighted average options outstanding	1,197,487		1,137,219
Anti-dilutive options not included in the computation	681,820		893,343