Notes Payable - Additional Information (Detail) | Aug. 15, 2018USD ($) | Jan. 31, 2018USD ($)$ / sharesshares | May 31, 2019USD ($)$ / sharesshares | Apr. 30, 2019USD ($) | Nov. 30, 2018USD ($)$ / sharesshares | Oct. 31, 2018USD ($)$ / sharesshares | Sep. 30, 2018USD ($)PromissoryNote | Aug. 31, 2018USD ($) | Apr. 30, 2018USD ($) | Aug. 31, 2017USD ($) | Jun. 30, 2019USD ($) | Jun. 30, 2018USD ($) | Jun. 30, 2019USD ($) | Jun. 30, 2018USD ($) | Dec. 31, 2018USD ($) |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, outstanding amount | | | | | | | | | | | $ 11,806,000 | | $ 11,806,000 | | $ 9,117,000 |
Convertible notes converted into shares of common stock | shares | | 570,287 | | | | | | | | | | | | | |
Warrants exercisable into shares of common stock | shares | | 570,287 | | | | | | | | | | | | | |
Exercise price of warrants, per share | $ / shares | | $ 9.15 | | | | | | | | | | | | | |
Amortization of debt discount | | $ 271,000 | | | | | | | | | 1,561,000 | | 1,561,000 | | 1,780,000 |
Amortization period of interest expense | | 3 years | | | | | | | | | | | | | |
Loss on debt conversion | | | | | | | | | | | | | 9,000 | | |
Accretion of discount | | | | | | | | | | | | | (1,159,000) | $ (135,000) | |
Notes remaining balance paid | | | | | | | | | | | | | 811,000 | 904,000 | |
Convertible Notes and Warrants [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Convertible notes term | | 3 years | | | | | | | | | | | | | |
Notes payable, interest rate | | 0.00% | | | | | | | | | | | | | |
Notes payable, outstanding amount | $ 275,000 | | | | | | | | | | | | | | |
Convertible notes amount | | $ 1,000,000 | | | | | | | | | | | | | |
Warrants value | | 127,000 | | | | | | | | | | | | | |
Conversion feature value | | 144,000 | | | | | | | | | | | | | |
Debt value | | $ 729,000 | | | | | | | | | | | | | |
Aggregate principal amount of converted notes to common stock | 725,000 | | | | | | | | | | | | | | |
Accretion of discount | | | | | | | | | | | 6,000 | | 12,000 | | |
Convertible Notes and Warrants [Member] | Interest Expense [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Loss on debt conversion | $ 163,000 | | | | | | | | | | | | | | |
Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Price Volatility [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | 105 | | | | | | | | | | | | | |
Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Risk Free Interest Rate [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | 2.20 | | | | | | | | | | | | | |
Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Entity Credit Risk [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | 7.70 | | | | | | | | | | | | | |
Notes Payable [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Interest expense | | | | | | | | | | | $ 900,000 | $ 325,000 | $ 1,628,000 | $ 572,000 | |
8% Secured Promissory Notes Due August 2018 [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, outstanding amount | | | | | | | | | | | | | | | $ 250,000 |
8% Secured Promissory Notes Due August 2018 [Member] | Notes Payable [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, issued amount | | | | | | | | | | $ 250,000 | | | | | |
Convertible notes term | | | | | | | | | | 1 year | | | | | |
Notes payable, interest rate | | | | | | | | | | 8.00% | 8.00% | | 8.00% | | 8.00% |
Notes payable, outstanding amount | | | | | | | | | | $ 250,000 | | | | | |
Notes payable, maturity date | | | | | | | | | | | | | Aug. 31, 2018 | | Aug. 31, 2018 |
4.02% Promissory Note Due April 2021 [Member] | Notes Payable [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, issued amount | | | | | | | | | $ 1,000,000 | | $ 704,000 | | $ 704,000 | | |
Notes payable, interest rate | | | | | | | | | 4.02% | | | | | | |
Notes payable, maturity date | | | | | | | | | Apr. 30, 2021 | | | | | | |
Annual principal payments,2019 | | | | | | | | | $ 305,000 | | | | | | |
Annual principal payments,2020 | | | | | | | | | 359,000 | | | | | | |
Annual principal payments,2021 | | | | | | | | | $ 183,000 | | | | | | |
0% Promissory Note Due April 2019 [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, outstanding amount | | | | | | | | | | | | | | | $ 418,000 |
0% Promissory Note Due April 2019 [Member] | Notes Payable [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, interest rate | | | | | | | | | | | 0.00% | | 0.00% | | 0.00% |
Notes payable, maturity date | | | | | | | | | | | | | Apr. 30, 2019 | | Apr. 30, 2019 |
0% Promissory Note Due April 2019 [Member] | Notes Payable [Member] | Unitron Assets [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, interest rate | | | | | | | | 0.00% | | | | | | | |
Notes payable, maturity date | | | | | | | | Apr. 30, 2019 | | | | | | | |
Assumption of debt under merger consideration | | | | | | | | $ 868,000 | | | | | | | |
Notes remaining balance paid | | | | $ 418,000 | | | | | | | | | | | |
Notes payable, maturity date, description | | | | | | | | $450,000 paid in October 2018 and $418,000 paid in April 2019 | | | | | | | |
0% Promissory Note Due October 2018 [Member] | Notes Payable [Member] | Unitron Assets [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, interest rate | | | | | | | | 0.00% | | | | | | | |
Notes payable, maturity date | | | | | | | | Oct. 31, 2018 | | | | | | | |
Notes remaining balance paid | | | | | | $ 450,000 | | | | | | | | | |
8% Promissory Note Due March 2021 [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, outstanding amount | | | | | | | | | | | $ 2,107,000 | | $ 2,107,000 | | $ 2,107,000 |
8% Promissory Note Due March 2021 [Member] | Notes Payable [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, issued amount | | | | | | | $ 2,107,000 | | | | | | | | |
Notes payable, interest rate | | | | | | | 8.00% | | | | 8.00% | | 8.00% | | 8.00% |
Notes payable, maturity date | | | | | | | | | | | | | Mar. 31, 2021 | | Mar. 31, 2021 |
Number of promissory notes | PromissoryNote | | | | | | | 12 | | | | | | | | |
12% Convertible Notes Due October 2019 [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, outstanding amount | | | | | | | | | | | $ 4,000,000 | | $ 4,000,000 | | $ 4,000,000 |
Convertible notes converted into shares of common stock | shares | | | | | | 941,181 | | | | | | | | | |
Warrants exercisable into shares of common stock | shares | | | | | | 470,592 | | | | | | | | | |
Exercise price of warrants, per share | $ / shares | | | | | | $ 4.25 | | | | | | | | | |
Amortization of debt discount | | | | | | $ 1,942,000 | | | | | | | | | |
Amortization period of interest expense | | | | | | 1 year | | | | | | | | | |
12% Convertible Notes Due October 2019 [Member] | Convertible Notes and Warrants [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Convertible notes term | | | | | | 1 year | | | | | | | | | |
Notes payable, interest rate | | | | | | 12.00% | | | | | | | | | |
Convertible notes amount | | | | | | $ 4,000,000 | | | | | | | | | |
Warrants value | | | | | | 769,000 | | | | | | | | | |
Conversion feature value | | | | | | 1,173,000 | | | | | | | | | |
Debt value | | | | | | $ 2,058,000 | | | | | | | | | |
Accretion of discount | | | | | | | | | | | $ 485,000 | | $ 971,000 | | |
12% Convertible Notes Due October 2019 [Member] | Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Price Volatility [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | | | | | 90 | | | | | | | | | |
12% Convertible Notes Due October 2019 [Member] | Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Risk Free Interest Rate [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | | | | | 2.47 | | | | | | | | | |
12% Convertible Notes Due October 2019 [Member] | Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Discount Rate [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | | | | | 25 | | | | | | | | | |
12% Convertible Notes Due October 2019 [Member] | Notes Payable [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, interest rate | | | | | | | | | | | 12.00% | | 12.00% | | 12.00% |
Notes payable, maturity date | | | | | | | | | | | | | Oct. 31, 2019 | | Oct. 31, 2019 |
12% Convertible Notes Due November 2019 [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, outstanding amount | | | | | | | | | | | $ 1,220,000 | | $ 1,220,000 | | $ 1,220,000 |
Convertible notes converted into shares of common stock | shares | | | | | 277,274 | | | | | | | | | | |
Warrants exercisable into shares of common stock | shares | | | | | 138,638 | | | | | | | | | | |
Exercise price of warrants, per share | $ / shares | | | | | $ 4.40 | | | | | | | | | | |
Amortization of debt discount | | | | | $ 118,000 | | | | | | | | | | |
Amortization period of interest expense | | | | | 1 year | | | | | | | | | | |
12% Convertible Notes Due November 2019 [Member] | Convertible Notes and Warrants [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Convertible notes term | | | | | 1 year | | | | | | | | | | |
Notes payable, interest rate | | | | | 12.00% | | | | | | | | | | |
Convertible notes amount | | | | | $ 1,220,000 | | | | | | | | | | |
Warrants value | | | | | 118,000 | | | | | | | | | | |
Debt value | | | | | $ 1,102,000 | | | | | | | | | | |
Accretion of discount | | | | | | | | | | | $ 29,000 | | $ 58,000 | | |
12% Convertible Notes Due November 2019 [Member] | Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Price Volatility [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | | | | 90 | | | | | | | | | | |
12% Convertible Notes Due November 2019 [Member] | Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Risk Free Interest Rate [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | | | | 2.52 | | | | | | | | | | |
12% Convertible Notes Due November 2019 [Member] | Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Discount Rate [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | | | | 25 | | | | | | | | | | |
12% Convertible Notes Due November 2019 [Member] | Notes Payable [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, interest rate | | | | | | | | | | | 12.00% | | 12.00% | | 12.00% |
Notes payable, maturity date | | | | | | | | | | | | | Nov. 30, 2019 | | Nov. 30, 2019 |
12% Convertible Notes Due May 2020 [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, outstanding amount | | | | | | | | | | | $ 3,500,000 | | $ 3,500,000 | | |
Convertible notes converted into shares of common stock | shares | | | 1,258,996 | | | | | | | | | | | | |
Warrants exercisable into shares of common stock | shares | | | 629,500 | | | | | | | | | | | | |
Exercise price of warrants, per share | $ / shares | | | $ 2.72 | | | | | | | | | | | | |
Amortization of debt discount | | | $ 940,000 | | | | | | | | | | | | |
Amortization period of interest expense | | | 1 year | | | | | | | | | | | | |
12% Convertible Notes Due May 2020 [Member] | Convertible Notes and Warrants [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Convertible notes term | | | 1 year | | | | | | | | | | | | |
Notes payable, interest rate | | | 12.00% | | | | | | | | | | | | |
Convertible notes amount | | | $ 3,500,000 | | | | | | | | | | | | |
Warrants value | | | 507,000 | | | | | | | | | | | | |
Conversion feature value | | | 243,000 | | | | | | | | | | | | |
Debt value | | | 2,750,000 | | | | | | | | | | | | |
Accretion of discount | | | | | | | | | | | $ 117,000 | | $ 117,000 | | |
Fundraising costs | | | $ 190,000 | | | | | | | | | | | | |
12% Convertible Notes Due May 2020 [Member] | Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Price Volatility [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | | 105 | | | | | | | | | | | | |
12% Convertible Notes Due May 2020 [Member] | Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Risk Free Interest Rate [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | | 2.33 | | | | | | | | | | | | |
12% Convertible Notes Due May 2020 [Member] | Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Discount Rate [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Fair value assumption | | | 30 | | | | | | | | | | | | |
12% Convertible Notes Due May 2020 [Member] | Notes Payable [Member] | | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | | |
Notes payable, interest rate | | | | | | | | | | | 12.00% | | 12.00% | | 12.00% |
Notes payable, maturity date | | | | | | | | | | | | | May 31, 2020 | | May 31, 2020 |