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Note 8 - Stock Options and Awards (Tables)
 12 Months Ended
Sep. 30, 2012
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
   
Year ended
 
   
September 30, 2012
   
September 30, 2011
 
   
(Amounts in thousands)
 
Cost of sales
  $ —     $ 1  
Engineering and development
    5       12  
Selling, general and administrative
    87       156  
Total
  $ 92     $ 169  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   
Year ended
 
   
September 30, 2012
   
September 30, 2011
 
Expected volatility
    52 %     57 %
Expected dividend yield
    2.92 %     —  
Risk-free interest rate
    1.32 %     2.88 %
Expected term (in years)
    7.25       6.88  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   
Number
of Shares
     
Weighted
average
exercise
price
   
Weighted
Average
Remaining
Contractual
Term (in years)
   
Aggregate
Intrinsic
Value
(in thousands)
 
                           
Outstanding at September 30, 2010
 
274,775
   
$
6.95
   
—
   
—
 
Granted
 
1,750
   
$
3.85
   
—
   
—
 
Expired
 
(31,100
)
 
$
5.05
   
—
   
—
 
Forfeited
 
—
   
—
   
—
   
—
 
Exercised
 
—
   
—
   
—
   
—
 
Outstanding at September 30, 2011
 
245,425
   
$
7.13
   
—
   
—
 
Granted
 
1,750
   
$
3.43
   
—
   
—
 
Expired
 
(750
)
 
$
4.79
   
—
   
—
 
Forfeited
 
—
   
—
   
—
   
—
 
Exercised
 
—
   
—
   
—
   
—
 
Outstanding at September 30, 2012
 
246,425
   
$
7.11
   
2.18
   
$
94
 
Exercisable at September 30, 2012
 
239,174
   
$
7.23
   
2.02
   
$
86
 
Vested and expected to vest at September 30, 2012
 
246,425
   
$
7.11
   
2.18
   
$
94
 
Schedule of Nonvested Share Activity [Table Text Block]
   
Number of
nonvested
shares
   
Weighted
Average
grant date
Fair
Value
 
Weighted
Average
Remaining
Contractual
Term (in years)
 
Aggregate
Intrinsic
Value
(in thousands)
 
                     
Nonvested shares outstanding at September 30, 2010
 
39,866
 
$
3.61
 
—
 
—
 
Activity in 2011:
               
Granted
 
37,000
 
$
3.97
 
—
 
—
 
Vested
 
(21,017)
 
$
3.58
 
—
 
—
 
Forfeited
 
—
 
—
 
—
 
—
 
Nonvested shares outstanding at September 30, 2011
 
55,849
 
$
3.86
 
—
 
—
 
Activity in 2012:
               
Granted
 
38,000
 
$
3.56
 
—
 
—
 
Vested
 
(27,766)
 
$
3.87
 
—
 
—
 
Forfeited
 
(29,333)
 
—
 
—
 
—
 
Nonvested shares outstanding at September 30, 2012
 
36,750
 
$
3.68
 
2.11
 
$
165
 
Vested at September 30, 2012
 
63,217
 
$
3.64
 
0.32
 
$
283
 
Vested and expected to vest at September 30, 2012
 
99,967
 
$
3.66
 
0.98
 
$
448