v2.4.0.8

3. Interest, Advances and Promissory Notes Payable (Details) - Summary Interest Payable Activity (USD $) | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012 | Dec. 31, 2012 | Dec. 31, 2011
Summary Interest Payable Activity [Abstract] |  |  |  |
| $ 1,948,625 | $ 1,569,321 | $ 1,569,321 | $ 1,930,695
Interest incurred on promissory notes payable | 379,304 |  | 505,571 |
Repayment of interest payable through line of credit |  | (6,500) |  |
Repayment of interest payable through exercise of options |  | (860,244) |  |
Other |  | $ (201) | $ (201) |

X
- Definition Carrying value as of the balance sheet date of other accrued interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid not described else where in the taxonomy. + References No definition available. + Details
Name: | alrt_OtherInterestPayable
Namespace Prefix: | alrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash inflow associated with the amount received from holders exercising their stock options to pay off an interest payable. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References No definition available. + Details
Name: | alrt_RepaymentOfInterestPayableThroughExerciseOfOptions
Namespace Prefix: | alrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow to pay off an interest payable from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity. + References No definition available. + Details
Name: | alrt_RepaymentOfInterestPayableThroughLineOfCredit
Namespace Prefix: | alrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | alrt_SummaryInterestPayableActivityAbstract
Namespace Prefix: | alrt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total interest costs incurred during the period and either capitalized or charged against earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
Name: | us-gaap_InterestCostsIncurred
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 [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 + Details
Name: | us-gaap_InterestPayableCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant