Stock-Based Compensation - Summary of Activity of Restricted Stock Awards, Restricted Stock Units and Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands | 6 Months Ended | 12 Months Ended |
Dec. 31, 2017 | Jun. 30, 2017 |
Stock Options [Member] | | |
Number of Shares, Outstanding, Beginning Balance | 215,000 | |
Number of Shares, Granted | 50,000 | |
Number of Shares, Forfeited, cancelled or expired | (35,000) | |
Number of Shares, Outstanding, Ending Balance | 230,000 | 215,000 |
Number of Shares, Expected to vest at December 31, 2017 | 80,625 | |
Number of Shares, Options Non-Vested | 149,375 | |
Number of Shares, Options Exercisable | 80,625 | |
Weighted Avg Grant Date Fair Value per Share, Outstanding, Beginning Balance | $ 1.67 | |
Weighted Avg Grant Date Fair Value per Share, Granted | 2.08 | |
Weighted Avg Grant Date Fair Value per Share, Forfeited, cancelled or expired | 0 | |
Weighted Avg Grant Date Fair Value per Share, Outstanding, Ending Balance | 1.71 | $ 1.67 |
Weighted Avg Grant Date Fair Value per Share, Expected to vest at December 31, 2017 | 1.69 | |
Weighted Avg Grant Date Fair Value per Share, Options Non-Vested | 1.71 | |
Weighted Avg Grant Date Fair Value per Share, Options Exercisable | $ 1.69 | |
Weighted Avg Contractual Term in Years, Outstanding | 8 years 8 months 4 days | 9 years 15 days |
Weighted Avg Contractual Term in Years, Granted | 0 years | |
Weighted Avg Contractual Term in Years, Forfeited, cancelled or expired | 0 years | |
Weighted Avg Contractual Term in Years, Expected to vest at December 31, 2017 | 8 years 7 months 9 days | |
Weighted Avg Contractual Term in Years, Options Non-Vested | 8 years 8 months 19 days | |
Weighted Avg Contractual Term in Years, Options Exercisable | 8 years 7 months 9 days | |
Aggregate Intrinsic Value, Outstanding, Beginning Balance | $ 0 | |
Aggregate Intrinsic Value, Granted | 0 | |
Aggregate Intrinsic Value, Forfeited, cancelled or expired | 0 | |
Aggregate Intrinsic Value, Outstanding, Ending Balance | 84 | $ 0 |
Aggregate Intrinsic Value, Options Vested | 31 | |
Aggregate Intrinsic Value, Options Non-Vested | 53 | |
Aggregate Intrinsic Value, Options Exercisable | $ 31 | |
Restricted Stock Awards [Member] | | |
Number of Shares, Outstanding, Beginning Balance | 2,631 | |
Number of Shares, Granted | 0 | |
Number of Shares, Exercised | (2,631) | |
Number of Shares, Released | 0 | |
Number of Shares, Vested | 0 | |
Number of Shares, Forfeited, cancelled or expired | 0 | |
Number of Shares, Outstanding, Ending Balance | 0 | 2,631 |
Number of Shares, Expected to vest at December 31, 2017 | 0 | |
Weighted Avg Grant Date Fair Value per Share, Outstanding, Beginning Balance | $ 3.80 | |
Weighted Avg Grant Date Fair Value per Share, Granted | 0 | |
Weighted Avg Grant Date Fair Value per Share, Exercised | (3.80) | |
Weighted Avg Grant Date Fair Value per Share, Released | 0 | |
Weighted Avg Grant Date Fair Value per Share, Vested | 0 | |
Weighted Avg Grant Date Fair Value per Share, Forfeited, cancelled or expired | 0 | |
Weighted Avg Grant Date Fair Value per Share, Outstanding, Ending Balance | 0 | $ 3.80 |
Weighted Avg Grant Date Fair Value per Share, Expected to vest at December 31, 2017 | 0 | |
Weighted Avg Grant Date Fair Value per Share, Options Non-Vested | 0 | |
Weighted Avg Grant Date Fair Value per Share, Options Exercisable | $ 0 | |
Weighted Avg Contractual Term in Years, Outstanding | 0 years | 5 months 27 days |
Weighted Avg Contractual Term in Years, Granted | 0 years | |
Weighted Avg Contractual Term in Years, Exercised | 5 months 26 days | |
Weighted Avg Contractual Term in Years, Released | 0 years | |
Weighted Avg Contractual Term in Years, Vested | 0 years | |
Weighted Avg Contractual Term in Years, Forfeited, cancelled or expired | 0 years | |
Weighted Avg Contractual Term in Years, Expected to vest at December 31, 2017 | 0 years | |
Aggregate Intrinsic Value, Outstanding, Beginning Balance | $ 5 | |
Aggregate Intrinsic Value, Granted | 0 | |
Aggregate Intrinsic Value, Exercised | (5) | |
Aggregate Intrinsic Value, Released | 0 | |
Aggregate Intrinsic Value, Vested | 0 | |
Aggregate Intrinsic Value, Forfeited, cancelled or expired | 0 | |
Aggregate Intrinsic Value, Outstanding, Ending Balance | 0 | $ 5 |
Aggregate Intrinsic Value, Expected to vest at December 31, 2017 | $ 0 | |
Restricted Stock Units [Member] | | |
Number of Shares, Outstanding, Beginning Balance | 33,334 | |
Number of Shares, Granted | 120,000 | |
Number of Shares, Exercised | (33,334) | |
Number of Shares, Released | 0 | |
Number of Shares, Vested | 0 | |
Number of Shares, Forfeited, cancelled or expired | 0 | |
Number of Shares, Outstanding, Ending Balance | 120,000 | 33,334 |
Number of Shares, Expected to vest at December 31, 2017 | 120,000 | |
Weighted Avg Grant Date Fair Value per Share, Outstanding, Beginning Balance | $ 2.25 | |
Weighted Avg Grant Date Fair Value per Share, Granted | 1.88 | |
Weighted Avg Grant Date Fair Value per Share, Exercised | (2.25) | |
Weighted Avg Grant Date Fair Value per Share, Released | 0 | |
Weighted Avg Grant Date Fair Value per Share, Vested | 0 | |
Weighted Avg Grant Date Fair Value per Share, Forfeited, cancelled or expired | 0 | |
Weighted Avg Grant Date Fair Value per Share, Outstanding, Ending Balance | 1.88 | $ 2.25 |
Weighted Avg Grant Date Fair Value per Share, Expected to vest at December 31, 2017 | $ 0 | |
Weighted Avg Contractual Term in Years, Outstanding | 10 years | 6 months |
Weighted Avg Contractual Term in Years, Granted | 10 years | |
Weighted Avg Contractual Term in Years, Exercised | 6 months | |
Weighted Avg Contractual Term in Years, Released | 0 years | |
Weighted Avg Contractual Term in Years, Vested | 0 years | |
Weighted Avg Contractual Term in Years, Forfeited, cancelled or expired | 0 years | |
Weighted Avg Contractual Term in Years, Expected to vest at December 31, 2017 | 0 years | |
Aggregate Intrinsic Value, Outstanding, Beginning Balance | $ 69 | |
Aggregate Intrinsic Value, Granted | 248 | |
Aggregate Intrinsic Value, Exercised | (69) | |
Aggregate Intrinsic Value, Released | 0 | |
Aggregate Intrinsic Value, Vested | 0 | |
Aggregate Intrinsic Value, Forfeited, cancelled or expired | 0 | |
Aggregate Intrinsic Value, Outstanding, Ending Balance | 248 | $ 69 |
Aggregate Intrinsic Value, Expected to vest at December 31, 2017 | $ 0 | |