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Note 7 - Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		Three-Month Periods Ended
		March 31, 2013				April 1, 2012
Risk-free interest rate			0.65	%			0.66	%
Volatility factor			63.17	%			62.93	%
Dividends			0.00	%			0.00	%
Weighted average expected life (years)			4.03				3.91

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

		Number of Shares				Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Term (years)				Aggregate Intrinsic Value
Shares under option at January 1, 2013			2,211,488			$	7.47
Options granted			114,000				3.39
Options exercised			(3,000	)			3.91
Options forfeited			(25,132	)			4.40
Options expired			(33,000	)			11.87
Shares under option at March 31, 2013			2,264,356			$	7.23				4.73			$	475
Vested and expected to vest as of March 31, 2013			2,055,554			$	7.49				4.63			$	390
Options exercisable at March 31, 2013			1,045,897			$	7.31				3.29			$	110

X

- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration