July 5, 2013, we entered into an asset purchase agreement (the "APA") with ILC Industries, LLC("Parent") and Data Device Corporation, a Delawarecorporation and a wholly owned subsidiary of Parent (the "Purchaser") pursuant to which the Company sold to the Purchaser certain assets comprising our data bus business ("Databus"), including substantially all of the assets of our wholly owned subsidiary, National Hybrid, Inc., a New Yorkcorporation. The Purchaser paid gross proceeds of approximately $32.2 millionin cash for the assets, of which $28.8 millionof the proceeds from such sale were used to repay certain of the Company's outstanding debt.
We derive operating revenues from our three principal business segments: SSC; EMS; and SSIA. The acquisitions of C-MAC on
March 22, 2012, Spectrum on June 1, 2011and the asset acquisitions of RTIE on March 19, 2012and CMT on November 29, 2011significantly expanded our SSC segment revenues. The operations of SenDECand the KGC Companies are now substantially reflected in our EMS segment (previously reported as part of the SSC segment). The asset acquisition of Cryptekon July 7, 2009resulted in the creation of our SSIA segment. Our customers are located primarily in the United States, Canadaand the United Kingdom, but we also sell products to customers located throughout the world. Systems, Subsystems& Components (SSC) Revenue includes high-performance RF/microwave, electromagnetic, power solutions, and microelectronics solutions used in high-reliability defense, space, industrial and commercial applications, including missile defense systems, radar systems, electronic warfare systems (e.g. counter-IED RF jamming devices), unmanned air, ground and robotic systems, satellites, as well as industrial, medical, energy and telecommunications products.