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Note 6 - Nil Coupon Non-Redeemable Convertible Unsedcured Loan Notes (Detail)
In Thousands, except Per Share data, unless otherwise specified
 1 Months Ended 12 Months Ended 12 Months Ended
Jun. 30, 2011
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Jun. 28, 2012
Original Amount [Member]
China Facility [Member]
CNY
Jun. 30, 2011
Original Amount [Member]
USD ($)
Jun. 30, 2011
Amended Amount [Member]
USD ($)
Dec. 31, 2012
Minimum [Member]
USD ($)
Jun. 30, 2011
Minimum [Member]
Dec. 31, 2012
Maximum [Member]
USD ($)
Jun. 30, 2011
Maximum [Member]
Jun. 28, 2012
People's Bank of China Base Rate [Member]
China Facility [Member]
Jun. 30, 2011
Amount Available for Increase Upon Approval of Lender [Member]
USD ($)
Dec. 31, 2012
Leverage Ratio [Member]
Dec. 31, 2012
China Facility [Member]
USD ($)
Jun. 29, 2012
China Facility [Member]
USD ($)
Jun. 29, 2012
China Facility [Member]
CNY
Dec. 31, 2011
China Facility [Member]
USD ($)
Debt Instrument, Face Amount   $ 76 $ 76                              
Debt Instrument, Convertible, Conversion Price (in Dollars per share)               $ 6.50   $ 11.43                
Debt Instrument, Convertible, Number of Equity Instruments   6,715                                
Share Price (in Dollars per share)   $ 4.20                                
Debt Instrument, Convertible, Carrying Amount of Equity Component   28                                
Repayments of Unsecured Debt   0 0 5                            
Line of Credit Facility, Expiration Date Jun. 30, 2013                                  
Line of Credit Facility, Maximum Borrowing Capacity         35,000 15,000 25,000           25,000     5,541 35,000  
Debt Instrument, Basis Spread on Variable Rate                 250.00%   375.00% 125.00%            
Line of Credit Facility, Covenant Terms                           1.5:1.0        
Annual Capital Expenditure Limit   10,000                                
Minimum Tangible Net Worth   50,000                                
Percentage of Net Income   50.00%                                
Percentage of Capital Issuances   100.00%                                
Letters of Credit Outstanding, Amount   7,432 1,374                       1,112     750
Line of Credit Facility, Remaining Borrowing Capacity   7,568 13,626                       4,429     3,580
Line of Credit Facility, Commitment Fee Percentage   0.25%                                
Line of Credit Facility, Amount Outstanding                             $ 0     $ 1,181
Line of Credit Facility, Interest Rate at Period End                             7.00%     7.60%