v3.21.2

Notes Payable (Narrative) (Details) - USD ($) |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 09, 2020 | Dec. 11, 2019 | Jul. 31, 2021 | Jun. 26, 2020 | Mar. 25, 2020 | Nov. 25, 2019 | Nov. 18, 2019 | Mar. 28, 2019 | Jun. 30, 2021 | Jun. 30, 2020
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes Payable |  |  |  |  |  |  |  |  | $ 1,030,079 | $ 1,030,079
Debt discount |  |  |  |  |  |  |  |  | 17,500 |
Interest accretion |  |  |  |  |  |  |  |  | $ 382,436 | $ 1,825,506
Unexercised warrants price per share |  |  |  |  |  |  |  |  |  | $ 4
Expiration period |  |  |  |  |  |  |  |  |  | 36 months
Exercise price |  |  |  |  |  |  |  |  |  | $ 4
Outstanding warrants expired |  |  |  |  |  |  |  |  | between November 29, 2021 and November 18, 2022 |
Unexercised warrants outstanding |  |  |  |  |  |  |  |  |  | $ 204,771,864
Notes Payable [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  |  | 4.00% | 3.00%
Debt maturity |  |  |  |  |  |  |  |  | Jun. 26, 2021 |
Notes Payable [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt maturity |  |  | Jul. 07, 2026 |  |  |  |  |  |  |
Notes Payable One [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Monthly installment |  |  |  |  |  |  |  |  | $ 13,137 |
Interest rate |  |  |  |  |  |  |  |  | 0.98% |
Debt maturity |  |  |  |  |  |  |  |  | Apr. 30, 2022 |
Notes Payable Two [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Monthly installment |  |  |  |  |  |  |  |  | $ 45,294 |
Interest rate |  |  |  |  |  |  |  |  | 10.00% |
Debt maturity |  |  |  |  |  |  |  |  | Jan. 13, 2022 |
Notes Payable Three [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Monthly installment |  |  |  |  |  |  |  |  | $ 731 |
Interest rate |  |  |  |  |  |  |  |  |  | 3.75%
Debt maturity |  |  |  |  |  |  |  |  | May 31, 2050 |
Notes Payable Four [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Monthly installment |  |  |  |  |  |  |  |  | $ 24,091 |
Debt maturity |  |  |  |  |  |  |  |  | Dec. 31, 2024 |
Notes Payable Four [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Monthly installment |  |  |  |  |  |  |  |  | $ 245 |
Notes Payable Four [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Monthly installment |  |  |  |  |  |  |  |  | 9,664 |
Notes Payable Five [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Monthly installment |  |  |  |  |  |  |  |  | $ 813 |
Debt term |  |  |  |  |  |  |  |  | 5 years |
Debt maturity |  |  |  |  |  |  |  |  | Jul. 31, 2020 |
Notes Payable Six [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Monthly installment |  |  |  |  |  |  |  |  | $ 679 |
Debt term |  |  |  |  |  |  |  |  | 6 years |
Interest rate |  |  |  |  |  |  |  |  | 8.99% |
Debt maturity |  |  |  |  |  |  |  |  | Dec. 31, 2025 |
Convertible Notes Payable [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes Payable |  |  |  |  |  |  |  | $ 225,000 |  |
Amounts withdraw |  |  |  |  |  |  |  | 56,250 |  |
Debt discount |  |  |  |  |  |  |  | $ 20,000 |  |
Interest rate |  |  |  |  |  |  |  | 10.00% |  |
Debt maturity |  |  |  |  |  |  |  | Nov. 30, 2020 |  |
Interest expense |  |  |  |  |  |  |  |  | $ 274,703 | $ 340,526
Prepayment penalties |  |  |  |  |  |  |  |  | $ 111,000 | $ 139,000
Percentage of lowest traded price |  |  |  |  |  |  |  | 70.00% |  |
Conversion price |  |  |  |  |  |  |  | $ 3 |  |
Convertible Notes Payable [Member] | Investor [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Share Issued |  |  |  |  |  |  |  | 25,000 |  |
Convertible Notes Payable [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage |  |  |  |  |  |  |  | 110.00% |  |
Convertible Notes Payable [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage |  |  |  |  |  |  |  | 125.00% |  |
Convertible Notes Payable one [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Amounts withdraw |  |  |  |  |  |  |  | $ 56,250 |  |
Debt maturity |  |  |  |  |  |  |  | Mar. 31, 2020 |  |
Convertible Notes Payable Two [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Amounts withdraw |  |  |  |  |  |  |  | $ 112,500 |  |
Debt maturity |  |  |  |  |  |  |  | Jun. 30, 2020 |  |
Convertible Notes Payable One [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes Payable |  |  |  |  |  |  | $ 110,000 |  |  |
Debt discount |  |  |  |  |  |  | $ 10,000 |  |  |
Interest rate |  |  |  |  |  |  | 8.00% |  |  |
Debt maturity |  |  |  |  |  |  | Nov. 30, 2020 |  |  |
Percentage of lowest traded price |  |  |  |  |  |  | 70.00% |  |  |
Percentage of lowest traded price before issue date |  |  |  |  |  |  | 70.00% |  |  |
Convertible Notes Payable One [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage |  |  |  |  |  |  | 115.00% |  |  |
Convertible Notes Payable One [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage |  |  |  |  |  |  | 125.00% |  |  |
Convertible Notes Payable Two [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes Payable |  | $ 220,430 |  |  |  |  |  |  |  |
Debt discount |  | $ 15,430 |  |  |  |  |  |  |  |
Interest rate |  | 8.00% |  |  |  |  |  |  |  |
Debt maturity |  | Dec. 31, 2020 |  |  |  |  |  |  |  |
Percentage of lowest traded price |  | 75.00% |  |  |  |  |  |  |  |
Conversion price |  | $ 0.46 |  |  |  |  |  |  |  |
Convertible Notes Payable Two [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage |  | 120.00% |  |  |  |  |  |  |  |
Convertible Notes Payable Two [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage |  | 130.00% |  |  |  |  |  |  |  |
Convertible Notes Payable Three [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes Payable |  |  |  |  |  | $ 1,000,000 |  |  |  |
Debt discount |  |  |  |  |  | $ 70,000 |  |  |  |
Interest rate |  |  |  |  |  | 8.00% |  |  |  |
Debt maturity |  |  |  |  |  | Nov. 30, 2020 |  |  |  |
Percentage of lowest traded price |  |  |  |  |  | 75.00% |  |  |  |
Conversion price |  |  |  |  |  | $ 0.46 |  |  |  |
Percentage of redemption premium |  |  |  |  |  | 115.00% |  |  |  |
Convertible Notes Payable Three [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes payable principal and interest |  |  |  |  |  | $ 250,000 |  |  |  |
Convertible Notes Payable Four [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes Payable | $ 225,000 |  |  |  |  |  |  |  |  |
Debt discount | $ 13,500 |  |  |  |  |  |  |  |  |
Interest rate | 8.00% |  |  |  |  |  |  |  |  |
Debt maturity | Oct. 31, 2020 |  |  |  |  |  |  |  |  |
Percentage of lowest traded price | 75.00% |  |  |  |  |  |  |  |  |
Amount of note increased | $ 250,000 |  |  |  |  |  |  |  |  |
Convertible Notes Payable Four [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage | 110.00% |  |  |  |  |  |  |  |  |
Convertible Notes Payable Four [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage | 125.00% |  |  |  |  |  |  |  |  |
Convertible Notes Payable Five [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes Payable |  |  |  |  | $ 338,625 |  |  |  |  |
Debt discount |  |  |  |  | $ 23,625 |  |  |  |  |
Interest rate |  |  |  |  | 8.00% |  |  |  |  |
Debt maturity |  |  |  |  | Mar. 31, 2021 |  |  |  |  |
Percentage of lowest traded price |  |  |  |  | 75.00% |  |  |  |  |
Conversion price |  |  |  |  | $ 0.46 |  |  |  |  |
Convertible Notes Payable Five [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage |  |  |  |  | 120.00% |  |  |  |  |
Convertible Notes Payable Five [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage |  |  |  |  | 130.00% |  |  |  |  |
Convertible Notes Payable Six [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Notes Payable |  |  |  | $ 430,000 |  |  |  |  |  |
Debt discount |  |  |  | $ 30,000 |  |  |  |  |  |
Interest rate |  |  |  | 8.00% |  |  |  |  |  |
Debt maturity |  |  |  | Jun. 30, 2021 |  |  |  |  |  |
Percentage of lowest traded price |  |  |  | 70.00% |  |  |  |  |  |
Conversion price |  |  |  | $ 0.47 |  |  |  |  |  |
Convertible Notes Payable Six [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage |  |  |  | 120.00% |  |  |  |  |  |
Convertible Notes Payable Six [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Prepayment penalties, percentage |  |  |  | 130.00% |  |  |  |  |  |
Line of Credit Interest Bearing [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  |  | 3.75% | 4.25%

X
- Definition Amount of note increased. + References No definition available. + Details
Name: | gaxy_AmountOfNoteIncreased
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amounts withdraw. + References No definition available. + Details
Name: | gaxy_AmountsWithdraw
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Notes payable principal and interest amount. + References No definition available. + Details
Name: | gaxy_NotesPayablePrincipalAndInterest
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of lowest traded price. + References No definition available. + Details
Name: | gaxy_PercentageOfLowestTradedPrice
Namespace Prefix: | gaxy_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of lowest traded price before issue date. + References No definition available. + Details
Name: | gaxy_PercentageOfLowestTradedPriceBeforeIssueDate
Namespace Prefix: | gaxy_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of redemption premium. + References No definition available. + Details
Name: | gaxy_PercentageOfRedemptionPremium
Namespace Prefix: | gaxy_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Prepayment penalties. + References No definition available. + Details
Name: | gaxy_PrepaymentPenalties
Namespace Prefix: | gaxy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Prepayment penalties, percentage. + References No definition available. + Details
Name: | gaxy_PrepaymentPenaltiesPercentage
Namespace Prefix: | gaxy_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unexercised warrants price per share. + References No definition available. + Details
Name: | gaxy_UnexercisedWarrantsPricePerShare
Namespace Prefix: | gaxy_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Outstanding warrants expired period. + References No definition available. + Details
Name: | gaxy_WarrantsAndRightsOutstandingMaturityDate1
Namespace Prefix: | gaxy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392676&loc=d3e7480-110848 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6394232&loc=d3e17558-110866 + Details
Name: | us-gaap_AccretionExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031898-161870 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 + Details
Name: | us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of the required periodic payments including both interest and principal payments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt discount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1D -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69F -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495745-112612 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69E -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495743-112612 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1F -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611 + Details
Name: | us-gaap_InterestExpenseDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermNotesPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOtherPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOtherPayablesOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOtherPayablesTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOtherPayablesThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOtherPayablesFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOtherPayablesFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_NotesPayableOtherPayablesSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_ConvertibleNotesPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=us-gaap_InvestorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_ConvertibleNotesPayableOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_ConvertibleNotesPayableTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_ConvertibleNotesPayable1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_ConvertibleNotesPayable2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_ConvertibleNotesPayable3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_ConvertibleNotesPayable4Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_ConvertibleNotesPayable5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_ConvertibleNotesPayable6Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=gaxy_LineOfCreditInterestBearingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |