Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document And Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Organization and Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Debt Agreements (Details Textual)

v3.8.0.1

Debt Agreements (Details Textual) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended
	Feb. 02, 2018	Mar. 21, 2018	Jul. 27, 2017	Mar. 31, 2018
Horizon Technology Finance Corporation [Member]
Debt Instrument [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 1.96
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			280,612
Class of Warrant or Right, Terms			18 months
Venture Loan [Member]
Debt Instrument [Line Items]
Early Repayment of Subordinated Debt	$ 3.0
Long-term Debt	$ 7.0
Venture Loan [Member] \| Horizon Technology Finance Corporation [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 7.0
Molteni Loan [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 4.0
Conversion of Debt to Equity Description		In addition, Molteni has the right to convert its portion of the debt into shares of our common stock at a conversion price of $1.20 per share and is required to effect this conversion of debt to equity if we complete an equity financing resulting in gross proceeds of at least $10.0 million at a price per share of common stock in excess of $1.20 and repay the $1.6 million balance of Horizons loan amount.
Proceeds from Subordinated Short-term Debt		$ 2.4
Series A Warrants [Member]
Debt Instrument [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 4.85
Series A Warrants [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 4.89
Series A Warrants [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 4.85
New Horizon Warrants [Member]
Debt Instrument [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 1.20
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		40,000

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Exercise price per share or per unit of warrants or rights outstanding.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Face (par) amount of debt instrument at time of issuance.

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The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets before its maturity.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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