Common Stock Compensation - Stock Options by Exercise Price (Details)	3 Months Ended
	Sep. 30, 2018 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range (in dollars per share)	$ 1.60
Exercise price upper range (in dollars per share)	$ 8.35
Number outstanding (in shares) | shares	335,206
Options Outstanding Weighted- Average Remaining Contractual Life	6 years 5 months 4 days
Weighted average exercise price (in dollars per share)	$ 5.61
Number exercisable (in shares) | shares	207,516
Options exercisable weighted average exercise price (in dollars per share)	$ 5.07
$1.60 – 3.55
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range (in dollars per share)	1.60
Exercise price upper range (in dollars per share)	$ 3.55
Number outstanding (in shares) | shares	78,900
Options Outstanding Weighted- Average Remaining Contractual Life	3 years 4 months 24 days
Weighted average exercise price (in dollars per share)	$ 3.21
Number exercisable (in shares) | shares	78,900
Options exercisable weighted average exercise price (in dollars per share)	$ 3.21
$5.30 – 5.85
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range (in dollars per share)	5.30
Exercise price upper range (in dollars per share)	$ 5.85
Number outstanding (in shares) | shares	126,306
Options Outstanding Weighted- Average Remaining Contractual Life	8 years 7 months 9 days
Weighted average exercise price (in dollars per share)	$ 5.47
Number exercisable (in shares) | shares	42,616
Options exercisable weighted average exercise price (in dollars per share)	$ 5.47
$6.00 – 8.35
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range (in dollars per share)	6.00
Exercise price upper range (in dollars per share)	$ 8.35
Number outstanding (in shares) | shares	130,000
Options Outstanding Weighted- Average Remaining Contractual Life	6 years 1 month 24 days
Weighted average exercise price (in dollars per share)	$ 7.19
Number exercisable (in shares) | shares	86,000
Options exercisable weighted average exercise price (in dollars per share)	$ 6.59