Revolving credit line (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Schedule of Notes Payable

The following table summarizes our notes payable balances as of:

	March 31, 2017		March 31, 2016
Revolving credit line - 4.50 percent at March 31, 2017 (prime plus 0.5 percent), due September 29, 2018 - current portion	$	1,100,000	$	—
Revolving credit line - long-term portion	2,500,000		—
Total	$	3,600,000	$	—