Notes Payable - Additional Information (Detail)
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1 Months Ended |
2 Months Ended |
3 Months Ended |
12 Months Ended |
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Aug. 15, 2018
USD ($)
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Jan. 31, 2018
USD ($)
$ / shares
shares
|
May 01, 2016 |
Nov. 30, 2018
USD ($)
$ / shares
shares
|
Oct. 31, 2018
USD ($)
$ / shares
shares
|
Sep. 30, 2018
USD ($)
PromissoryNote
|
Aug. 31, 2018
USD ($)
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Apr. 30, 2018
USD ($)
|
May 31, 2015
USD ($)
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Aug. 31, 2017
USD ($)
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Mar. 31, 2017
USD ($)
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Dec. 31, 2018
USD ($)
$ / shares
|
Dec. 31, 2017
USD ($)
|
Jun. 01, 2018
$ / shares
shares
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| Debt Instrument [Line Items] |
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| Notes payable, amount repaid/retired |
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$ 1,763,000
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$ 1,179,000
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| Notes payable, outstanding amount |
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$ 9,117,000
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8,940,000
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| Convertible notes converted into shares of common stock | shares |
|
570,287
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| Warrants exercisable into shares of common stock | shares |
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570,287
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1,183,116
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| Exercise price of warrants, per share | $ / shares |
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$ 9.15
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$ 3.73
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$ 3.02
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| Debt value |
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3,756,000
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| Amortization of debt discount |
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$ 271,000
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$ 1,780,000
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26,000
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| Amortization period of interest expense |
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3 years
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| Aggregate principal amount of converted notes to common stock |
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11,445,000
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| Loss on debt conversion |
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1,227,000
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| Accretion of discount |
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(800,000)
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(368,000)
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| Convertible Notes and Warrants [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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0.00%
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| Convertible notes term |
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3 years
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| Notes payable, outstanding amount |
$ 275,000
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| Convertible notes amount |
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$ 1,000,000
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| Warrants value |
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127,000
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| Conversion feature value |
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144,000
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| Debt value |
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$ 729,000
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| Aggregate principal amount of converted notes to common stock |
725,000
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| Accretion of discount |
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45,000
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| Convertible Notes and Warrants [Member] | Interest Expense [Member] |
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| Debt Instrument [Line Items] |
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| Loss on debt conversion |
163,000
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| Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Price Volatility [Member] |
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| Debt Instrument [Line Items] |
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| Fair value assumption |
|
105
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| Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Risk Free Interest Rate [Member] |
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| Debt Instrument [Line Items] |
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| Fair value assumption |
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2.20
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| Warrants [Member] | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Entity Credit Risk [Member] |
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| Debt Instrument [Line Items] |
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| Fair value assumption |
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7.70
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| Notes Payable [Member] |
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| Debt Instrument [Line Items] |
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| Interest expense |
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557,000
|
279,000
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| 10% Promissory Note [Member] | Notes Payable [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, issued amount |
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$ 500,000
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| Notes payable, interest rate |
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10.00%
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| Notes payable, maturity date |
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Apr. 30, 2016
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| Notes payable amended date |
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May 01, 2016
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| 8% Secured Promissory Notes Due July/August 2018 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, outstanding amount |
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$ 250,000
|
$ 1,350,000
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| 8% Secured Promissory Notes Due July/August 2018 [Member] | Notes Payable [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, issued amount |
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$ 1,350,000
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| Notes payable, interest rate |
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8.00%
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|
8.00%
|
8.00%
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| Convertible notes term |
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1 year
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| Notes payable, amount repaid/retired |
$ 750,000
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$ 350,000
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| Notes payable, outstanding amount |
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$ 250,000
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| Notes payable, maturity date, description |
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July/August 2018
|
July/August 2018
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| 0% Promissory Notes Due January and March 2018 [Member] | Notes Payable [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, issued amount |
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|
$ 715,000
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| Notes payable, interest rate |
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0.00%
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| Convertible notes term |
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1 year
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| 8% Promissory Notes Due March 2019 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, outstanding amount |
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|
$ 715,000
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| 8% Promissory Notes Due March 2019 [Member] | Notes Payable [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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|
8.00%
|
8.00%
|
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| Notes payable, maturity date |
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Mar. 31, 2019
|
Mar. 31, 2019
|
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| 0% Promissory Notes Due May 2018 [Member] |
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| Debt Instrument [Line Items] |
|
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| Notes payable, outstanding amount |
|
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|
$ 261,000
|
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| 0% Promissory Notes Due May 2018 [Member] | Notes Payable [Member] |
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| Debt Instrument [Line Items] |
|
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| Notes payable, interest rate |
|
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|
0.00%
|
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|
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|
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|
0.00%
|
0.00%
|
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| Notes payable, maturity date |
|
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|
May 31, 2018
|
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|
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|
May 31, 2018
|
May 31, 2018
|
|
| Notes payable, amount repaid/retired |
|
|
|
$ 261,000
|
|
|
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| 8% Promissory Note Due March 2019 [Member] |
|
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| Debt Instrument [Line Items] |
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| Notes payable, outstanding amount |
|
|
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|
$ 200,000
|
|
| 8% Promissory Note Due March 2019 [Member] | Notes Payable [Member] |
|
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| Debt Instrument [Line Items] |
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| Notes payable, issued amount |
|
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|
$ 200,000
|
|
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| Notes payable, interest rate |
|
|
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|
8.00%
|
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|
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|
8.00%
|
8.00%
|
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| Notes payable, maturity date |
|
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|
Mar. 31, 2019
|
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Mar. 31, 2019
|
Mar. 31, 2019
|
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| 8% Promissory Notes Due March 2019 [Member] |
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| Debt Instrument [Line Items] |
|
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| Notes payable, outstanding amount |
|
|
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|
|
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|
$ 1,776,000
|
|
| 8% Promissory Notes Due March 2019 [Member] | Notes Payable [Member] |
|
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| Debt Instrument [Line Items] |
|
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| Notes payable, interest rate |
8.00%
|
|
|
|
|
|
|
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|
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|
8.00%
|
8.00%
|
|
| Notes payable, maturity date |
Mar. 31, 2019
|
|
|
|
|
|
|
|
|
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|
Mar. 31, 2019
|
Mar. 31, 2019
|
|
| Notes payable, amount repaid/retired |
$ 1,776,000
|
|
|
|
|
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|
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| 8% Secured Promissory Notes Due March 2019 [Member] |
|
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| Debt Instrument [Line Items] |
|
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|
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| Notes payable, outstanding amount |
|
|
|
|
|
|
|
|
|
|
|
|
$ 3,455,000
|
|
| 8% Secured Promissory Notes Due March 2019 [Member] | Notes Payable [Member] |
|
|
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|
|
|
|
|
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| Debt Instrument [Line Items] |
|
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|
|
|
|
|
|
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| Notes payable, issued amount |
|
|
|
|
|
$ 675,000
|
|
|
|
|
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|
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| Notes payable, interest rate |
|
|
|
|
|
|
|
|
|
|
|
8.00%
|
8.00%
|
|
| Notes payable, maturity date |
|
|
|
|
|
|
|
|
|
|
|
Mar. 31, 2019
|
Mar. 31, 2019
|
|
| Notes payable, amount repaid/retired |
$ 2,780,000
|
|
|
|
|
|
|
|
|
|
|
|
|
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| Notes payable, outstanding amount |
|
|
|
|
|
|
|
|
|
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|
$ 3,455,000
|
|
|
| 4.02% Promissory Note Due April 2021 [Member] | Notes Payable [Member] |
|
|
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| Debt Instrument [Line Items] |
|
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|
|
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| Notes payable, issued amount |
|
|
|
|
|
|
|
$ 1,000,000
|
|
|
|
|
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|
| Notes payable, interest rate |
|
|
|
|
|
|
|
4.02%
|
|
|
|
|
|
|
| Notes payable, maturity date |
|
|
|
|
|
|
|
Apr. 30, 2021
|
|
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|
| 0% Promissory Note Due April 2019 [Member] |
|
|
|
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|
|
|
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|
| Debt Instrument [Line Items] |
|
|
|
|
|
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|
|
|
|
|
|
|
|
| Notes payable, outstanding amount |
|
|
|
|
|
|
|
|
|
|
|
$ 418,000
|
|
|
| 0% Promissory Note Due April 2019 [Member] | Notes Payable [Member] |
|
|
|
|
|
|
|
|
|
|
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|
| Debt Instrument [Line Items] |
|
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|
|
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|
|
|
|
|
|
|
|
|
| Notes payable, interest rate |
|
|
|
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
| Notes payable, outstanding amount |
|
|
|
|
|
|
$ 418,000
|
|
|
|
|
|
|
|
| Assumption of debt under merger consideration |
|
|
|
|
|
|
$ 868,000
|
|
|
|
|
|
|
|
| Notes payable, maturity date, description |
|
|
|
|
|
|
$450,000 paid in October 2018 and $418,000 due 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 payable, amount repaid/retired |
|
|
|
|
$ 450,000
|
|
|
|
|
|
|
|
|
|
| 8% Promissory Note Due March 2021 [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Notes payable, outstanding amount |
|
|
|
|
|
|
|
|
|
|
|
$ 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%
|
|
| 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
|
|
|
| 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] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Notes payable, interest rate |
|
|
|
|
12.00%
|
|
|
|
|
|
|
|
|
|
| Convertible notes term |
|
|
|
|
1 year
|
|
|
|
|
|
|
|
|
|
| Convertible notes amount |
|
|
|
|
$ 4,000,000
|
|
|
|
|
|
|
|
|
|
| Warrants value |
|
|
|
|
769,000
|
|
|
|
|
|
|
|
|
|
| Conversion feature value |
|
|
|
|
1,173,000
|
|
|
|
|
|
|
|
|
|
| Debt value |
|
|
|
|
$ 2,058,000
|
|
|
|
|
|
|
|
|
|
| Accretion of discount |
|
|
|
|
|
|
|
|
|
|
|
$ 324,000
|
|
|
| 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%
|
|
| 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
|
|
|
| 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] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Notes payable, interest rate |
|
|
|
12.00%
|
|
|
|
|
|
|
|
|
|
|
| Convertible notes term |
|
|
|
1 year
|
|
|
|
|
|
|
|
|
|
|
| Convertible notes amount |
|
|
|
$ 1,220,000
|
|
|
|
|
|
|
|
|
|
|
| Warrants value |
|
|
|
118,000
|
|
|
|
|
|
|
|
|
|
|
| Debt value |
|
|
|
$ 1,102,000
|
|
|
|
|
|
|
|
|
|
|
| Accretion of discount |
|
|
|
|
|
|
|
|
|
|
|
$ 10,000
|
|
|
| 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%
|
|
| Notes payable, maturity date |
|
|
|
|
|
|
|
|
|
|
|
Nov. 30, 2019
|
Nov. 30, 2019
|
|