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Segment Information (Detail) - The following table presents certain operating segment information. - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sales:    
Product $ 59,661 $ 76,353
Service 13,255 12,139
Total sales 72,916 88,492
Profit (loss) from operations (1,601) 3,395
Assets, Continuing Operations   41,873
Disposal Group, Including Discontinued Operation, Assets   17,055
Assets 55,275 58,928
Capital Expenditures Incurred but Not yet Paid 438 207
Depreciation, Depletion and Amortization, Nonproduction 625 485
Systems Segment [Member]    
Sales:    
Product 7,014 7,608
Service 3,465 6,236
Total sales 10,479 13,844
Profit (loss) from operations (2,777) 1,467
Assets, Continuing Operations   17,782
Assets 14,869 17,782
Capital Expenditures Incurred but Not yet Paid 99 99
Depreciation, Depletion and Amortization, Nonproduction 243 224
UK [Member]    
Sales:    
Product 7,501 10,727
Service 606 763
Total sales 8,107 11,490
Profit (loss) from operations (475) (30)
Assets, Continuing Operations   6,879
Assets 13,854 6,879
Capital Expenditures Incurred but Not yet Paid 1 0
Depreciation, Depletion and Amortization, Nonproduction 7 9
US [Member]    
Sales:    
Product 45,146 58,018
Service 9,184 5,140
Total sales 54,330 63,158
Profit (loss) from operations 1,651 1,958
Assets, Continuing Operations   17,212
Assets 26,552 17,212
Capital Expenditures Incurred but Not yet Paid 338 108
Depreciation, Depletion and Amortization, Nonproduction 375 252
Total Service And System Integration Segment [Member]    
Sales:    
Product 52,647 68,745
Service 9,790 5,903
Total sales 62,437 74,648
Profit (loss) from operations 1,176 1,928
Assets, Continuing Operations   24,091
Assets 40,406 24,091
Capital Expenditures Incurred but Not yet Paid 339 108
Depreciation, Depletion and Amortization, Nonproduction $ 382 $ 261