Basis of Presentation	3 Months Ended
Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation References in this document to “the Company,” “LightPath,” “we,” “us,” or “our” are intended to mean LightPath Technologies, Inc., individually, or as the context requires, collectively with its subsidiaries on a consolidated basis. The accompanying unaudited consolidated financial statements have been prepared in accordance with the requirements of Article 8 of Regulation S-X promulgated under the Securities Exchange Act of 1934, as amended, and, therefore, do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with accounting principles generally accepted in the United States of America. These consolidated financial statements should be read in conjunction with our consolidated financial statements and related notes, included in our Annual Report on Form 10-K for the fiscal year ended June 30, 2017, filed with the Securities and Exchange Commission (the “SEC”). Unless otherwise stated, references to particular years or quarters refer to our fiscal years ended June 30 and the associated quarters of those fiscal years. These consolidated financial statements are unaudited, but include all adjustments, including normal recurring adjustments, which, in the opinion of management, are necessary to present fairly our financial position, results of operations and cash flows for the interim periods presented. Results of operations for interim periods are not necessarily indicative of the results that may be expected for the year as a whole. History: We were incorporated in Delaware in 1992 as the successor to LightPath Technologies Limited Partnership, a New Mexico limited partnership, formed in 1989, and its predecessor, Integrated Solar Technologies Corporation, a New Mexico corporation, formed in 1985. We completed our initial public offering (“IPO”) during fiscal 1996. On April 14, 2000, we acquired Horizon Photonics, Inc. (“Horizon”). On September 20, 2000, we acquired Geltech, Inc. (“Geltech”). In November 2005, we formed LightPath Optical Instrumentation (Shanghai) Co., Ltd (“LPOI”), a wholly-owned subsidiary located in Jiading, People’s Republic of China. In December 2013, we formed LightPath Optical Instrumentation (Zhenjiang) Co., Ltd (“LPOIZ”), a wholly-owned subsidiary located in Zhenjiang, Jiangsu Province, People’s Republic of China. In December 2016, we acquired ISP Optics Corporation, a New York corporation (“ISP”), and its wholly-owned subsidiary, ISP Optics Latvia, SIA, a limited liability company founded in 1998 under the Laws of the Republic of Latvia (“ISP Latvia”). See Note 3, Acquisition of ISP Optics Corporation, to these unaudited Consolidated Financial Statements, for additional information. We are a manufacturer and integrator of families of precision molded aspheric optics, diamond turned, ground and polished infrared optics, high-performance fiber-optic collimators, GRADIUM glass lenses and other optical materials used to produce products that manipulate light. We design, develop, manufacture and distribute optical components and assemblies utilizing the latest optical processes and advanced manufacturing technologies. We also perform research and development for optical solutions for the traditional optics markets and communications markets.

Basis of Presentation

3 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

1. Basis of Presentation

References in this document to “the Company,” “LightPath,” “we,” “us,” or “our” are intended to mean LightPath Technologies, Inc., individually, or as the context requires, collectively with its subsidiaries on a consolidated basis.

The accompanying unaudited consolidated financial statements have been prepared in accordance with the requirements of Article 8 of Regulation S-X promulgated under the Securities Exchange Act of 1934, as amended, and, therefore, do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with accounting principles generally accepted in the United States of America. These consolidated financial statements should be read in conjunction with our consolidated financial statements and related notes, included in our Annual Report on Form 10-K for the fiscal year ended June 30, 2017, filed with the Securities and Exchange Commission (the “SEC”). Unless otherwise stated, references to particular years or quarters refer to our fiscal years ended June 30 and the associated quarters of those fiscal years.

These consolidated financial statements are unaudited, but include all adjustments, including normal recurring adjustments, which, in the opinion of management, are necessary to present fairly our financial position, results of operations and cash flows for the interim periods presented. Results of operations for interim periods are not necessarily indicative of the results that may be expected for the year as a whole.

History:

We were incorporated in Delaware in 1992 as the successor to LightPath Technologies Limited Partnership, a New Mexico limited partnership, formed in 1989, and its predecessor, Integrated Solar Technologies Corporation, a New Mexico corporation, formed in 1985. We completed our initial public offering (“IPO”) during fiscal 1996. On April 14, 2000, we acquired Horizon Photonics, Inc. (“Horizon”). On September 20, 2000, we acquired Geltech, Inc. (“Geltech”). In November 2005, we formed LightPath Optical Instrumentation (Shanghai) Co., Ltd (“LPOI”), a wholly-owned subsidiary located in Jiading, People’s Republic of China. In December 2013, we formed LightPath Optical Instrumentation (Zhenjiang) Co., Ltd (“LPOIZ”), a wholly-owned subsidiary located in Zhenjiang, Jiangsu Province, People’s Republic of China. In December 2016, we acquired ISP Optics Corporation, a New York corporation (“ISP”), and its wholly-owned subsidiary, ISP Optics Latvia, SIA, a limited liability company founded in 1998 under the Laws of the Republic of Latvia (“ISP Latvia”). See Note 3, Acquisition of ISP Optics Corporation, to these unaudited Consolidated Financial Statements, for additional information.

We are a manufacturer and integrator of families of precision molded aspheric optics, diamond turned, ground and polished infrared optics, high-performance fiber-optic collimators, GRADIUM glass lenses and other optical materials used to produce products that manipulate light. We design, develop, manufacture and distribute optical components and assemblies utilizing the latest optical processes and advanced manufacturing technologies. We also perform research and development for optical solutions for the traditional optics markets and communications markets.