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Quarterly Results of Operations (Tables)
 12 Months Ended
Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]  
Schedule of Quarterly Financial Information [Table Text Block]
The following table sets forth selected unaudited quarterly statements of operations data for the eight quarters ending March 31, 2011 through December 31, 2012. The information for each of these quarters has been prepared on the same basis as our audited financial statements and, in the opinion of management, includes all adjustments necessary for a fair statement of the results of operations for such periods. This data should be read in conjunction with the financial statements and related notes.

 
 
Three Months Ended
 
 
March 31,
 
June 30,
 
September 30,
 
December 31,
 
 
2012
 
2012 (1)
 
2012 (2)
 
2012 (3)
 
 
(in thousands, except per share information)
 
 
 
 
 
 
 
 
 
Total revenues, net
 
$
27,531

 
$
26,824

 
$
26,025

 
$
30,780

Gross profit
 
17,244

 
15,875

 
15,222

 
19,130

Net loss
 
(1,438
)
 
(399
)
 
(608
)
 
(973
)
Net loss per common share - basic (4)
 
(0.06
)
 
(0.02
)
 
(0.02
)
 
(0.04
)
Net loss per common share - diluted (4)
 
(0.06
)
 
(0.02
)
 
(0.02
)
 
(0.04
)
 
 
 
 
 
 
 
 
 
 
 
 Three Months Ended
 
 
March 31,
 
June 30,
 
September 30,
 
December 31,
 
 
2011 (5)
 
2011
 
2011 (6)
 
2011
 
 
(in thousands, except per share information)
 
 
 
 
 
 
 
 
 
Total revenues, net
 
$
29,177

 
$
27,860

 
$
26,595

 
$
29,689

Gross profit
 
19,787

 
18,092

 
16,312

 
18,938

Gain on settlement and change in fair value of contingent consideration (7)
 
506

 
(6,439
)
 
—

 
—

Net (loss) income
 
(1,125
)
 
3,393

 
686

 
(6,527
)
Net (loss) income per common share - basic (4)
 
(0.08
)
 
0.14

 
0.03

 
(0.27
)
Net (loss) income per common share - diluted (4)
 
(0.08
)
 
0.13

 
0.03

 
(0.27
)

(1) 
During the second quarter of 2012, the Company recorded correcting entries to increase operating expenses by $51 thousand for the correction of immaterial errors in accrued expenses in the three months ended June 30, 2012.
(2) 
During the third quarter of 2012, the Company recorded a correcting entry to reduce stock-based compensation expense by $32 thousand for the correction of immaterial errors in additional paid-in capital for the three months ended September 30, 2012.
(3)