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Accounts Receivable and Contracts in Progress
 12 Months Ended
Dec. 31, 2014
Accounts Receivable and Contracts in Progress [Abstract]  
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Accounts receivable and contracts in progress

Accounts receivable at December 31, 2014 and 2013, consists of the following:
 
December 31,
 
2014
 
2013
Accounts receivable
$
64,004

 
$
40,842

Unbilled receivables
7,959

 
6,784

Total receivables
71,963

 
47,626

Less: Allowance for doubtful accounts
(868
)
 
(1,060
)
Accounts receivable, net
$
71,095

 
$
46,566


The bad debt expense reflected in general and administrative expenses in the accompanying Consolidated Statements of Comprehensive Income for the years ended December 31, 2014, 2013 and 2012, totaled approximately $(0.1) million, $0.4 million and $(0.3) million, respectively.
Activity related to contracts in progress at December 31, 2014 and 2013, is summarized as follows:
 
December 31,
 
2014
 
2013
Costs and estimated earnings recognized to date
$
349,874

 
$
221,905

Progress billings to date
(400,349
)
 
(260,372
)
Total
$
(50,475
)
 
$
(38,467
)

The foregoing table reflects the aggregate invoiced amount of all contracts in progress and maintenance as of the respective dates, including amounts that have already been collected.

These amounts are included in the accompanying Consolidated Balance Sheets at December 31, 2014 and 2013, as follows: 
 
December 31,
 
2014
 
2013
Unbilled receivables
$
7,959

 
$
6,784

Deferred revenue
(58,434
)
 
(45,251
)
Total
$
(50,475
)
 
$
(38,467
)

At December 31, 2014 and 2013, the Company had approximately $20.2 million and $11.4 million, respectively, in deferred maintenance and support revenue, which is reflected above within deferred revenue and progress billing.
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Accounts receivable at December 31, 2014 and 2013, consists of the following:
 
December 31,
 
2014
 
2013
Accounts receivable
$
64,004

 
$
40,842

Unbilled receivables
7,959

 
6,784

Total receivables
71,963

 
47,626

Less: Allowance for doubtful accounts
(868
)
 
(1,060
)
Accounts receivable, net
$
71,095

 
$
46,566