Going Concern Evaluation - Additional Information (Detail) - USD ($) $ in Millions			1 Months Ended		3 Months Ended
	May 03, 2018	Mar. 05, 2018	Sep. 30, 2017	May 31, 2017	Mar. 31, 2018
Going Concern Evaluation [Line Items]
Substantial doubt about going concern, management's evaluation					In connection with preparing consolidated financial statements for the three months ended March 31, 2018, management evaluated whether there were conditions and events, considered in the aggregate, that raised substantial doubt about the Company’s ability to continue as a going concern within one year from the date that the financial statements are issued. The Company considered the following:  Operating losses for twelve consecutive quarters.  Negative cash flow from operating activities for eight consecutive quarters. Ordinarily, conditions or events that raise substantial doubt about an entity’s ability to continue as a going concern relate to the entity’s ability to meet its obligations as they become due. The Company evaluated its ability to meet its obligations as they become due within one year from the date that the financial statements are issued by considering the following:  In May 2017, the Company raised $2.2 million of new capital in a private placement offering of its common stock.  In September 2017, the Company closed on a $5.5 million preferred stock transaction which converted $2.8 million of long and short-term debt, and raised $2.7 million of new capital.  On March 5, 2018, the Company raised $5.0 million of new capital in a private placement offering of its common stock.  On May 3, 2018, the Company raised $7.0 million of new capital in a private placement offering of its common stock. In addition to the recent capital raised, management also believes that the Company will generate enough cash from operations to satisfy its obligations for the next twelve months from the issuance date.
Number of consecutive period of operating losses					36 months
Number of consecutive period of negative cash flows from operating activities					24 months
Preferred stock transaction			$ 5.5
Debt instrument, principal amount			2.8
New equity capital raised			$ 2.7
Substantial doubt about going concern, management's plans, substantial doubt not alleviated					The Company will take the following actions, if it starts to trend unfavorably to its internal profitability and cash flow projections, in order to mitigate conditions or events that would raise substantial doubt about its ability to continue as a going concern:  Raise additional funds through short-term loans.  Implement additional restructuring and cost reductions.  Raise additional capital through a private placement.  Secure a commercial bank line of credit.  Dispose of one or more product lines.  Sell or license intellectual property.
Private Placement [Member]
Going Concern Evaluation [Line Items]
Common stock raised of new capital, value		$ 5.0		$ 2.2
Private Placement [Member] | Subsequent Event [Member]
Going Concern Evaluation [Line Items]
Common stock raised of new capital, value	$ 7.0