Stock-based compensation expense and assumptions (Details) $ / shares in Units, shares in Millions | 3 Months Ended | 9 Months Ended |
Sep. 30, 2015USD ($)item$ / sharesshares | Jun. 30, 2015USD ($)shares | Mar. 31, 2015USD ($)shares | Sep. 30, 2014USD ($) | Sep. 30, 2015USD ($) | Sep. 30, 2014USD ($) |
Stock-based expense | | | | | | |
Total stock-based compensation expense | $ 736,151 | | | $ 365,597 | $ 1,197,741 | $ 951,390 |
Processing and service costs | | | | | | |
Stock-based expense | | | | | | |
Total stock-based compensation expense | 43,030 | | | 69,275 | 143,611 | 195,585 |
Selling general and administrative expenses | | | | | | |
Stock-based expense | | | | | | |
Total stock-based compensation expense | 656,197 | | | 207,405 | 1,017,206 | 631,755 |
Restructuring charge | | | | | | |
Stock-based expense | | | | | | |
Total stock-based compensation expense | $ 36,924 | | | 88,917 | 36,924 | 124,050 |
Stock options | | | | | | |
Stock-based expense | | | | | | |
Options granted (in shares) | shares | 1.6 | 0.1 | 0.2 | | | |
Fair value of options granted | $ 1,500,000 | $ 100,000 | $ 200,000 | | | |
Requisite service period | | 36 months | 36 months | | | |
Total stock-based compensation expense | $ 528,249 | | | 235,573 | 783,954 | 655,965 |
Stock options | Minimum | | | | | | |
Stock-based expense | | | | | | |
Requisite service period | 24 months | | | | | |
Stock options | Maximum | | | | | | |
Stock-based expense | | | | | | |
Requisite service period | 36 months | | | | | |
Restricted stock | | | | | | |
Stock-based expense | | | | | | |
Awards granted (in shares) | shares | | | 0.1 | | | |
Fair value of awards granted | | | $ 100,000 | | | |
Requisite service period | | | 36 months | | | |
Total stock-based compensation expense | $ 207,902 | | | $ 130,024 | $ 413,787 | $ 295,425 |
Restricted stock | Officers | Awarded third quarter 2015, expires May 1, 2018 | | | | | | |
Stock-based expense | | | | | | |
Awards granted (in shares) | shares | 0.3 | | | | | |
Number of tranches | item | 4 | | | | | |
Restricted stock | Officers | Awarded third quarter 2015, expires May 1, 2017 and December 31, 2017 | | | | | | |
Stock-based expense | | | | | | |
Awards granted (in shares) | shares | 0.3 | | | | | |
Number of tranches | item | 3 | | | | | |
Restricted stock | Officers | Awarded third quarter 2015, expires May 1, 2017 | | | | | | |
Stock-based expense | | | | | | |
Number of tranches | item | 2 | | | | | |
Restricted stock | Officers | Tranches one, two and three | Awarded third quarter 2015, expires May 1, 2018 | | | | | | |
Stock-based expense | | | | | | |
Awards granted (in shares) | shares | 0.1 | | | | | |
Fair value of awards granted | $ 100,000 | | | | | |
Number of tranches | item | 3 | | | | | |
Restricted stock | Officers | Tranche one | Awarded third quarter 2015, expires May 1, 2017 | | | | | | |
Stock-based expense | | | | | | |
Fair value of awards granted | $ 100,000 | | | | | |
Restricted stock | Officers | Tranche two | Awarded third quarter 2015, expires May 1, 2017 | | | | | | |
Stock-based expense | | | | | | |
Fair value of awards granted | $ 100,000 | | | | | |
Restricted stock | Officers | Tranche four | Awarded third quarter 2015 expires December 31, 2017 | | | | | | |
Stock-based expense | | | | | | |
Awards granted (in shares) | shares | 0.2 | | | | | |
Restricted stock | Directors | | | | | | |
Stock-based expense | | | | | | |
Awards granted (in shares) | shares | 0.1 | | | | | |
Fair value of awards granted | $ 200,000 | | | | | |
Requisite service period | 12 months | | | | | |
Performance shares | | | | | | |
Stock-based expense | | | | | | |
Total stock-based compensation expense | $ 0 | | | | | |
Performance shares | Officers | Tranche three | Awarded third quarter 2015 expires December 31, 2017 | | | | | | |
Stock-based expense | | | | | | |
Fair value of awards granted | 600,000 | | | | | |
Performance shares | Officers | Tranche four | Awarded third quarter 2015 expires December 31, 2017 | | | | | | |
Stock-based expense | | | | | | |
Fair value of awards granted | 600,000 | | | | | |
Performance shares | Officers | Minimum | Tranche four | Awarded third quarter 2015 expires December 31, 2017 | | | | | | |
Stock-based expense | | | | | | |
Threshold for Performance Condition | $ 18,000,000 | | | | | |
Market condition | Officers | Tranches one, two and three | Awarded third quarter 2015, expires May 1, 2018 | | | | | | |
Stock-based expense | | | | | | |
Number of consecutive trading days | 7 days | | | | | |
Number of trading days | item | 10 | | | | | |
Period of consecutive days for stock price | 35 days | | | | | |
Market condition | Officers | Tranche three | Awarded third quarter 2015 expires December 31, 2017 | | | | | | |
Stock-based expense | | | | | | |
Fair value of awards granted | $ 300,000 | | | | | |
Market condition | Officers | Tranche four | Awarded third quarter 2015 expires December 31, 2017 | | | | | | |
Stock-based expense | | | | | | |
Fair value of awards granted | $ 300,000 | | | | | |
Number of consecutive trading days | 7 days | | | | | |
Number of trading days | item | 10 | | | | | |
Period of consecutive days for stock price | 35 days | | | | | |
Market condition | Officers | Minimum | Tranches one, two and three | Awarded third quarter 2015, expires May 1, 2018 | | | | | | |
Stock-based expense | | | | | | |
Share price for market condition | $ / shares | $ 4 | | | | | |
Market condition | Officers | Minimum | Tranche four | Awarded third quarter 2015 expires December 31, 2017 | | | | | | |
Stock-based expense | | | | | | |
Share price for market condition | $ / shares | $ 3.50 | | | | | |