ESPP maximum annual share replenishment.

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ESPP maximum annual share replenishment percentage of prior year outstanding company common stock.

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Employee stock purchase plan weighted average purchase price of shares purchased.

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Number of ESPP shares available for future issuance.

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The reduction rate in the number of shares reserved under the option plan attributable to awards other than options or stock appreciation rights.

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Aggregate number of common shares reserved for future issuance.

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Amount of discretionary contributions made by an employer to a defined contribution plan.

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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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Amount of cost capitalized for award under share-based payment arrangement.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Number of options outstanding, including both vested and non-vested options.

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Price of a single share of a number of saleable stocks of a company.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Purchase price of common stock expressed as a percentage of its fair value.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Note 9 - Employee Benefit Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	Nov. 16, 2011	Jul. 31, 2001	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2001	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 13.52
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period			87,000	30,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance			745,000	1,027,000		1,045,000
Share-based Payment Arrangement, Amount Capitalized			$ 309
Share Price			$ 16.89
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 1,700	$ 400
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value			$ 300
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent			60.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount			$ 0
Software Development [Member]
Share-based Payment Arrangement, Amount Capitalized			$ 300
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			2 years 292 days
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 700
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$ 8.66
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			2 years 219 days
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 17,700
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate		10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		85.00%
ESPP Maximum Annual Share Replenishment		675,000
ESPP Maximum Annual Share Replenishment Percentage of Prior Year Outstanding Company Common Stock		2.00%
Common Stock, Capital Shares Reserved for Future Issuance			9,381,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans			172,000	201,000
Employee Stock Purchase Plan Weighted Average Purchase Price of Shares Purchased			$ 8.92	$ 9.12
Number Of ESPP Shares Available For Future Issuance			5,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 3.72	$ 3.62
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount			$ 800
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			1 year 47 days
Twenty Eleven Stock Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance			10,800,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	10,300,000
Share Based Compensation Arrangement By Share Based Payment Award Shares Reserved Decrease Rate	1.33
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			3,500,000
Twenty Eleven Stock Incentive Plan [Member] \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Shares Previously Issued Under the 2001 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized					3,500,000
IDS Plan [Member] \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period					10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					4 years
Two Thousand One Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period			500,000
Outside of the 2011, 2001 or IDS Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance			0