The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity.

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Including the current and noncurrent portions, the carrying value of convertible subordinated debt, as of the balance sheet date, initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. This form of debt can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder, and places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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The price per share of the conversion feature embedded in the debt instrument.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

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Fair value portion of notes payable.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Selected Balance Sheet Accounts (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Property, Plant and Equipment [Line Items]
Fair value of note	$ 1,300		$ 1,300
Convertible subordinated promissory note issued	$ 1,000		$ 1,000
Stock price volatility (in hundredths)			65.00%
Interest is payable at an annual interest rate (in hundredths)	6.00%		6.00%
Shares issued upon conversion of note			30,600
Shares issued upon conversion of note price per share	$ 16.34		$ 16.34
Amortization expense	$ 1,400	$ 1,400	$ 2,700	$ 2,800
Sales Revenue Net [Member]
Property, Plant and Equipment [Line Items]
Concentration risk			30.00%	27.00%
Accounts Receivable [Member]
Property, Plant and Equipment [Line Items]
Concentration risk			38.00%	43.00%
Concentration risk, amount			$ 10,000	$ 12,800