The Company provides the following distinctive services: (a) direct hire placement services, (b) temporary professional services staffing in the fields of information technology, accounting, finance, office, engineering, and medical, and (c) temporary light industrial staffing. These Companys services can be divided into two reportable segments, Industrial Staffing Services and Professional Staffing Services. Some selling, general and administrative expenses are not fully allocated among light industrial services and professional staffing services. Unallocated corporate expenses primarily include, certain executive compensation expenses and salaries, certain administrative salaries, corporate legal expenses, stock compensation expenses, consulting expenses, audit fees, corporate rent and facility costs, board fees, acquisition, integration and restructuring expenses, and interest expense. Three Months Ended December 31, 2019 2018 Industrial Staffing Services Industrial services revenue $ 5,655 $ 5,620 Industrial services gross margin 15.6 % 13.9 Operating income $ 281 $ 255 Depreciation &amp; amortization $ 69 $ 64 Professional Staffing Services Permanent placement revenue $ 4,479 $ 4,529 Placement services gross margin 100 % 100 Professional services revenue $ 27,423 $ 28,394 Professional services gross margin 26.4 % 26.1 Operating income $ 1,562 $ 2,219 Depreciation and amortization $ 1,408 $ 1,411 Unallocated Expenses Corporate administrative expenses $ 952 $ 609 Corporate facility expenses 90 106 Stock Compensation expense 597 581 Acquisition, integration and restructuring expenses 377 1,159 Total unallocated expenses $ 2,016 $ 2,455 Consolidated Total revenue $ 37,557 $ 38,543 Operating (loss) income (173 ) 19 Depreciation and amortization $ 1,477 $ 1,475