Net Assets Investment Company, Portfolio Turnover C000190956 [Member] Driehaus Emerging Markets Growth Fund - Institutional Class C000005025 [Member] Driehaus Emerging Markets Growth Fund - Investor Class C000101771 [Member] Driehaus Emerging Markets Small Cap Growth Fund C000176647 [Member] Driehaus Global Fund C000050883 [Member] Driehaus International Small Cap Growth Fund C000249377 [Member] Driehaus International Developed Equity Fund C000132648 [Member] Driehaus Micro Cap Growth Fund C000190999 [Member] Driehaus Small Cap Growth Fund - Institutional Class C000190998 [Member] Driehaus Small Cap Growth Fund - Investor Class C000219126 [Member] Driehaus Small/Mid Cap Growth Fund Investment Type [Axis] Other less than 4 percent country [Member] UNITED STATES Healthcare Sector [Member] Financial Services Sector [Member] Other less than 4 Percent [Member] Northern Institutional U.S. Government Portfolio, 3.46% [Member] Astera Labs, Inc. [Member] Guardant Health, Inc. [Member] Praxis Precision Medicines, Inc. [Member] Comfort Systems USA, Inc. [Member] Carpenter Technology Corp. [Member] Curtiss-Wright Corp. [Member] Natera, Inc. [Member] Silicon Motion Technology Corp. - ADR [Member] Credo Technology Group Holding Ltd. [Member] CANADA Energy Sector [Member] Northern Institutional U.S. Government Select Portfolio (Shares Class), 3.53% [Member] Vicor Corp. [Member] Apogee Therapeutics, Inc. [Member] Definium Therapeutics, Inc. [Member] Planet Labs PBC [Member] Spyre Therapeutics, Inc. [Member] Ultra Clean Holdings, Inc. [Member] Cardinal Infrastructure Group, Inc. - A [Member] CECO Environmental Corp. [Member] nLight, Inc. [Member] Xometry, Inc. - A [Member] Edgewise Therapeutics, Inc. [Member] JAPAN NETHERLANDS UNITED KINGDOM SWITZERLAND FRANCE GERMANY ITALY ASML Holding NV [Member] Infineon Technologies AG [Member] Northern Institutional Treasury Portfolio, 3.51% [Member] Tokyo Electron Ltd. [Member] Japan Tobacco, Inc. [Member] Ryohin Keikaku Co. Ltd. [Member] ICON PLC [Member] Cie Financiere Richemont SA - A [Member] Panasonic Holdings Corp. [Member] UBS Group AG [Member] AUSTRIA AUSTRALIA INDIA AT&S Austria Technologie & Systemtechnik AG [Member] SigmaRoc PLC [Member] Smiths Group PLC [Member] Omron Corp. [Member] Resonac Holdings Corp. [Member] Azbil Corp. [Member] Seiko Group Corp. [Member] PVA TePla AG [Member] Senior PLC [Member] Asahi Intecc Co. Ltd. [Member] TAIWAN Alphabet, Inc. - A [Member] NVIDIA Corp. [Member] Amazon.com, Inc. [Member] Ibiden Co. Ltd. [Member] Taiwan Semiconductor Manufacturing Co. Ltd. [Member] Eli Lilly And Co. [Member] Eli Lilly & Co. [Member] Seagate Technology Holdings PLC [Member] Disco Corp. [Member] KOREA, REPUBLIC OF CHINA MEXICO BRAZIL Hyosung Heavy Industries Corp. [Member] Vista Energy SAB de CV - ADR [Member] HPSP Co. Ltd. [Member] Orizon Valorizacao de Residuos SA [Member] Hitachi Energy India Ltd. [Member] Kinik Co. [Member] GE Vernova T&D India Ltd. [Member] Mega Union Technology, Inc. [Member] Aditya Infotech Ltd. [Member] Samsung Electronics Co. Ltd. [Member] SK hynix, Inc. [Member] Taiwan Semiconductor Manufacturing Co. Ltd. - SP ADR [Member] Tencent Holdings Ltd. [Member] ASE Technology Holding Co. Ltd. [Member] OTP Bank Nyrt. [Member] CTBC Financial Holding Co. Ltd. [Member] Credicorp Ltd. [Member]