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Debt - Additional Information (Detail) - USD ($) |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 29, 2017 | Aug. 24, 2017 | Aug. 23, 2017 | Aug. 22, 2017 | Aug. 21, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Feb. 08, 2017 | Feb. 07, 2017 | Sep. 06, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2017 | Sep. 02, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,800,000 |
Proceeds from short term secured borrowing arrangement |  |  |  |  |  |  |  |  |  |  | $ 1,200,000 | $ 1,903,000 |  |
Loss on related party debt extinguishment |  |  |  |  |  |  |  |  |  |  | (405,000) |  |  |
Long-term debt, net, carrying amount |  |  |  |  |  |  |  |  |  |  | 3,800,000 | 2,600,000 |  |
Debt issuance costs |  |  |  |  |  |  |  |  |  |  | 100,000 | 200,000 |  |
Debt discount |  |  |  |  |  |  |  |  |  |  | 400,000 | $ 1,200,000 |  |
Short-term Related Party Loan Extinguishment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of equity interest exchanged |  |  |  |  |  |  |  |  |  |  | 800,000 |  |  |
Reduction in fair value due to allocation of legal fees and other direct issuance costs |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |
Loss on related party debt extinguishment |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |
Long-term Related Party Loan Extinguishment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction in fair value due to allocation of legal fees and other direct issuance costs |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |
Loss on related party debt extinguishment |  |  |  |  |  |  |  |  |  |  | 400,000 |  |  |
Fair value of equity interest transferred |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |
Long-term debt, net, carrying amount |  |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |
Debt issuance costs |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |
Debt discount |  |  |  |  |  |  |  |  |  |  | $ 400,000 |  |  |
Series B 10% Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, dividend rate | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
William W. and Dieva L. Smith [Member] | Short-term Indebtedness [Member] | Series B 10% Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount | $ 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued upon convertible debt | 750 |  |  |  |  |  |  |  |  |  |  |  |  |
William W. and Dieva L. Smith [Member] | Long-term Indebtedness [Member] | Series B 10% Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued upon convertible debt | 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |
William W. and Dieva L. Smith [Member] | Secured Promissory Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from short term secured borrowing arrangement |  |  |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |
Interest rate per annum |  |  |  |  |  |  |  |  | 18.00% |  |  |  |  |
Notes due date |  |  |  |  |  |  |  |  |  |  | Mar. 24, 2017 |  |  |
Debt instrument extended maturity date |  |  |  |  |  |  |  |  |  |  | Jun. 26, 2017 |  |  |
William W. and Dieva L. Smith [Member] | Secured Promissory Note [Member] | New Short-term Secured Borrowing Arrangement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate per annum |  |  | 12.00% |  |  | 12.00% |  |  |  |  |  |  |  |
Notes due date |  |  | Jan. 25, 2018 | Jan. 25, 2018 | Sep. 25, 2017 |  |  |  |  |  | Sep. 25, 2017 |  |  |
Aggregate principal amount |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |
Notes due date, description |  |  |  |  |  |  |  |  |  |  | The maturity date of the Replacement Note entered into with Smith may be extended by up to 180 days upon the mutual consent of the Company and Smith. Each of the Replacement Notes are secured by the Company’s accounts receivable and certain other assets. |  |  |
Proceeds from short term secured borrowing arrangement |  |  | $ 800,000 |  |  |  |  |  |  |  |  |  |  |
Steven L. and Monique P. Elfman [Member] | Secured Promissory Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from short term secured borrowing arrangement |  |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |
Interest rate per annum |  |  |  |  |  | 12.00% |  | 18.00% |  |  |  |  |  |
Notes due date |  |  |  |  |  | Sep. 25, 2017 |  | Mar. 24, 2017 |  |  | Mar. 24, 2017 |  |  |
Debt instrument extended maturity date |  |  |  |  |  | Feb. 11, 2018 | Jun. 23, 2017 |  |  |  |  |  |  |
Proceeds from short term secured borrowing arrangement |  |  |  |  |  | $ 1,000,000 |  | $ 1,000,000 |  |  |  |  |  |
Steven L. and Monique P. Elfman [Member] | Secured Promissory Note [Member] | New Short-term Secured Borrowing Arrangement Matured on June 23, 2017 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from short term secured borrowing arrangement |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |
Notes due date |  |  |  |  |  |  |  |  |  |  | Jun. 23, 2017 |  |  |
Steven L. and Monique P. Elfman [Member] | Secured Promissory Note [Member] | New Short-term Secured Borrowing Arrangement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate per annum |  |  |  |  |  | 12.00% |  |  |  |  |  |  |  |
Notes due date |  |  |  | Jan. 25, 2018 | Sep. 25, 2017 |  |  |  |  |  | Sep. 25, 2017 |  |  |
Aggregate principal amount |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |
Andrew Arno [Member] | Short-term Indebtedness [Member] | Series B 10% Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued upon convertible debt | 50 |  |  |  |  |  |  |  |  |  |  |  |  |
Andrew Arno [Member] | Secured Promissory Note [Member] | New Short-term Secured Borrowing Arrangement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate per annum |  | 12.00% |  |  |  |  |  |  |  |  |  |  |  |
Notes due date |  | Jan. 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from short term secured borrowing arrangement |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |
Unterberg Koller Capital Fund L.P. and William W. and Dieva L. Smith [Member] | Note and Warrant Purchase Agreement [Member] | Senior Subordinated Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate per annum |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |
Notes due date |  |  |  |  |  |  |  |  |  | Sep. 06, 2019 |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,000,000
Notes maturity period |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |

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