Stock-based compensation expense (Details) shares in Millions	3 Months Ended				6 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($) $ / shares item shares	Mar. 31, 2016 USD ($) shares	Sep. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) $ / shares	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Stock-based expense
Options granted (in shares) | shares			0.8
Total stock-based compensation expense	$ 317,459			$ 736,151		$ 1,498,358	$ 1,197,741
Processing and service costs
Stock-based expense
Total stock-based compensation expense	35,051			43,030		134,112	143,611
Selling general and administrative expenses
Stock-based expense
Total stock-based compensation expense	282,408			656,197		1,364,246	1,017,206
Restructuring charge
Stock-based expense
Total stock-based compensation expense				36,924			36,924
Stock options
Stock-based expense
Fair value of options granted			$ 700,000
Requisite service period			36 months
Total stock-based compensation expense	217,537			528,249		766,766	783,954
Restricted stock
Stock-based expense
Total stock-based compensation expense	$ 99,922			$ 207,902		$ 731,592	$ 413,787
Restricted stock | Officers
Additional information
Restricted stock awards vested (in shares) | shares		0.5
Number of consecutive trading days equal or over $3.50 per share | item		7
Number of trading days equal or over $3.50 per share over a consecutive thirty-five day period | item		10
Number of consecutive days which any ten trading days equal or over $3.50 per share | item		35
Value at market condition					$ 700,000
Restricted stock awards expensed		$ 200,000	$ 500,000
Restricted stock | Officers | Awarded third quarter 2015 expires December 31, 2017
Additional information
Minimum volume weighted average price on NASDAQ (per share) | $ / shares		3.50			3.50
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