XML 54 R42.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Significant Accounting Policies (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Non-cash changes in inventory $ 555 $ 294
Research and Development Expense (in Dollars) 3,277 2,362
Inventory Valuation Reserves $ 3,300 2,900
Number of Years Defined Benefit Plans are Closed to Newly Hired Employees 2 years  
Number of Years Supplementary Retirement Plans are Closed to Newly Hired Employees 2 years  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) 0  
Stock-based compensation expense on stock options and restricted stock awards $ 691 577
Minimum    
Finite-Lived Intangible Asset, Useful Life 3 years  
Property, Plant and Equipment, Useful Life 3 years  
Hardware Warranty Included in Product Sales 90 days  
Maximum    
Finite-Lived Intangible Asset, Useful Life 10 years  
Property, Plant and Equipment, Useful Life 7 years  
Hardware Warranty Included in Product Sales 3 years  
Systems Segment [Member]    
Royalty revenue $ 2,500 $ 5,400