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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2016
Significant Accounting Policies [Abstract]  
Schedule of graduation fund liability

The table below presents activity in the Graduation Fund for the years ended December 31, 2015 and 2016 (in thousands):

 

 

 

 

 

 

 

 

 

 

    

December 31,

 

    

December 31,

 

 

 

2015

 

    

2016

 

Balance at beginning of period

 

$
9,706

 

    

$
20,937

 

Revenue deferred

 

 
16,219

 

 

 
20,766

 

Benefit redeemed

 

 
(4,988)

 

 

 
(12,204)

 

Balance at end of period

 

$
20,937

 

 

$
29,499

 

 

Schedule of tuition receivable and allowance for doubtful accounts

The Company’s tuition receivable and allowance for doubtful accounts were as follows as of December 31, 2015 and 2016 (in thousands):

 

 

 

 

 

 

 

 

 

 

    

December 31, 2015

    

December 31, 2016

 

Tuition receivable

 

$
28,543

 

$
30,733

 

Allowance for doubtful accounts

 

 
(10,024)

 

 
(10,201)

 

Tuition receivable, net

 

$
18,519

 

$
20,532

 

 

Schedule of allowance for doubtful accounts

The following table illustrates changes in the Company’s allowance for doubtful accounts for each of the three years ended December 31, 2016 (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2014

 

2015

 

2016

 

Allowance for doubtful accounts, beginning of period

 

$
10,303

 

$
8,835

 

$
10,024

 

Additions charged to expense

 

 
16,947

 

 
13,067

 

 
16,503

 

Write-offs, net of recoveries

 

 
(18,415)

 

 
(11,878)

 

 
(16,326)

 

   Allowance for doubtful accounts, end of period

 

$
8,835

 

$
10,024

 

$
10,201

 

 

Schedule of changes in goodwill

The following table presents changes in goodwill for the years ended December 31, 2015 and 2016 (in thousands):

 

 

 

 

 

 

 

 

 

 

2015

 

2016

Balance as of the beginning of period

 

$
6,800

 

$
6,800

  Acquisition (see Note 3)

 

 

 —

 

 
14,242

Measurement period adjustments

 

 

 —

 

 
(298)

Balance as of the end of period

 

$
6,800

 

$
20,744

 

Schedule of reconciliation of shares used to calculate basic and diluted earnings per share

Set forth below is a reconciliation of shares used to calculate basic and diluted earnings per share for each of the three years ended December 31, 2016 (in thousands):

 

 

 

 

 

 

 

 

 

 

    

2014

    

2015

    

2016

 

Weighted average shares outstanding used to compute basic earnings per share

 
10,561

 
10,588

 
10,610

 

Incremental shares issuable upon the assumed exercise of stock options

 
6

 
6

 
5

 

Unvested restricted stock and restricted stock units

 
83

 
146

 
230

 

    Shares used to compute diluted earnings per share

 
10,650

 
10,740

 
10,845