Revolving Credit Line (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Summary of revolving credit line

The following table summarizes our revolving credit line balances as of:

	June 30, 2018		December 31, 2017
Revolving credit line - 6.0 percent at June 30, 2018 (prime plus 1.0 percent), due September 29, 2018	$	4,000,000	$	4,900,000
Total	$	4,000,000	$	4,900,000