v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name FIRSTHAND FUNDS
Entity Central Index Key 0000917124
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
C000032051  
Shareholder Report [Line Items]  
Fund Name Firsthand Technology Opportunities Fund
Class Name Firsthand Technology Opportunities Fund
Trading Symbol TEFQX
Annual or Semi-Annual Statement [Text Block] This Semi-Annual shareholder report contains important information about Firsthand Technology Opportunities Fund for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at www.firsthandfunds.com. You can also request this information by contacting us at 1-888-884-2675.
Additional Information Phone Number 1-888-884-2675
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">www.firsthandfunds.com</span>
Expenses [Text Block]

What were the Fund’s costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Fund
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
TEFQX
$96
1.85%
Expenses Paid, Amount $ 96
Expense Ratio, Percent 1.85%
AssetsNet $ 51,449,869
Holdings Count | Holding 30
Advisory Fees Paid, Amount $ 335,360
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$51,449,869
  • # of Portfolio Holdings30
  • Portfolio Turnover Rate29%
  • Investment Advisory Fees Paid$335,360
Holdings [Text Block]

Industry Weightings 

Bar Chart showing Group By Industry
Table Summary
Value
Value
Net Cash
6.3
Other Industries
3.3
Telecommunications
2.7
Financial
3.1
Electric
4.1
Communications
5.2
Software
6.1
Electronics
7.7
Industrials
8.8
Semiconductors
9.3
Defense & Aerospace
20.9
Internet
22.5

Market Cap Weightings

(% of Net Assets)

Pie Chart showing Group By Market Capital Weightings
Table Summary
Value
Value
Giant Cap (More than $25B)
47.9%
Large Cap ($5-$25B)
31.4%
Mid Cap ($1-$5B)
11.3%
Small Cap ($250M - $1B)
1.1%
Micro Cap (less than $250M)
2.0%
Net Cash
6.3%

Country Weightings 

Bar Chart showing Group By Country
Table Summary
Value
Value
Netherlands
4.5
United States
95.5
Largest Holdings [Text Block]

Top 10 Holdings (% of Net Assets)

Table Summary
Roku, Inc.
16.1%
Rocket Lab Corp.
11.9%
Bloom Energy Corp.
8.8%
Coherent Corp.
7.7%
Viasat, Inc.
5.2%
ASM International N.V.
4.5%
Oklo, Inc.
4.1%
Broadcom, Inc.
3.7%
Palantir Technologies, Inc.
3.0%
Robinhood Markets, Inc.
2.9%
C000052080  
Shareholder Report [Line Items]  
Fund Name Firsthand Alternative Energy Fund
Class Name Firsthand Alternative Energy Fund
Trading Symbol ALTEX
Annual or Semi-Annual Statement [Text Block] This Semi-Annual shareholder report contains important information about Firsthand Alternative Energy Fund for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at www.firsthandfunds.com. You can also request this information by contacting us at 1-888-884-2675.
Additional Information Phone Number 1-888-884-2675
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">www.firsthandfunds.com</span>
Expenses [Text Block]

What were the Fund’s costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Fund
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
ALTEX
$128
1.98%
Expenses Paid, Amount $ 128
Expense Ratio, Percent 1.98%
AssetsNet $ 14,641,450
Holdings Count | Holding 40
Advisory Fees Paid, Amount $ 97,582
InvestmentCompanyPortfolioTurnover 8.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$14,641,450
  • # of Portfolio Holdings40
  • Portfolio Turnover Rate8%
  • Investment Advisory Fees Paid$97,582
Holdings [Text Block]

Industry Weightings 

Bar Chart showing Group By Industry
Table Summary
Value
Value
Net Cash
-3.8
Other Industries
1.6
Building Materials
2.0
Oil&Gas
2.7
Pipelines
4.1
Electronics
7.1
Electric
8.7
Commercial Services
10.3
Telecommunications
11.3
Energy
12.7
Semiconductors
14.7
Industrials
28.6

Market Cap Weightings

(% of Net Assets)

Pie Chart showing Group By Market Capital Weightings
Table Summary
Value
Value
Giant Cap (More than $25B)
74.0%
Large Cap ($5-$25B)
21.2%
Mid Cap ($1-$5B)
6.0%
Small Cap ($250M - $1B)
1.5%
Micro Cap (less than $250M)
1.1%
Net Cash
-3.8%

Country Weightings 

Bar Chart showing Group By Country
Table Summary
Value
Value
Spain
0.1
Japan
1.2
Ireland
1.5
France
2.7
Denmark
2.8
Netherlands
3.5
Switzerland
5.4
United States
82.8
Largest Holdings [Text Block]

Top 10 Holdings (% of Net Assets)

Table Summary
Bloom Energy Corp.
20.7%
Corning, Inc.
11.3%
Quanta Services, Inc.
10.3%
Oklo, Inc.
7.1%
ABB, Ltd. - SP
5.2%
Axcelis Technologies, Inc.
5.2%
Enphase Energy, Inc.
4.4%
The Williams Cos., Inc.
4.1%
ON Semiconductor Corp.
3.9%
GE Vernova, Inc.
3.2%