Acquisition of Singular Payments, LLC. (Details) - USD ($)		12 Months Ended
	Sep. 01, 2017	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Cash payments to acquire businesses		$ 0	$ 900,000
Outstanding balance of note receivable assumed		$ 0	$ 600,000
Common stock, par value (in dollars per share)		$ 0.001	$ 0.001
Singular Payments, LLC
Business Acquisition [Line Items]
Aggregate purchase price	$ 5,000,000
Cash payments to acquire businesses	1,500,000
Outstanding balance of note receivable assumed	600,000
Equity interest issued or issuable, value	$ 3,500,000
Equity interest issued or issuable, number of shares (in shares)	1,515,152
Common stock, par value (in dollars per share)	$ 0.001
Share price (in dollars per share)	$ 2.31
Equity interest issued, lock-up agreement, term	24 months
Equity interest issued, basis for determining value, number of business days preceding September 1, 2017	5 days