Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Accounts receivable, allowance for uncollectible accounts	$ 50,000	$ 50,000
Common stock, par value	$ .02	$ .02
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	13,688,903	13,502,653
Common stock, shares outstanding	13,688,903	13,502,653