v2.4.0.8

3. Interest, Advances and Promissory Notes Payable (Details) - Advances Payable Activity (USD $) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Advances Payable Activity [Abstract] |  |  |
| $ 115,613 | $ 105,613 | $ 100,527
Advances accrued | 30,000 | 60,000 |
Advances repaid from proceeds of line of credit | $ (20,000) | $ (54,914) |

X
- Definition The aggregate amount of accrued advances to be paid. + References No definition available. + Details
Name: | alrt_AdvancesAccrued
Namespace Prefix: | alrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition The cash outflow from advancing money. + References No definition available. + Details
Name: | alrt_AdvancesPayableNet
Namespace Prefix: | alrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow during the period from the advance repaid for additional borrowings on the credit facility during the period. + References No definition available. + Details
Name: | alrt_AdvancesRepaidFromProceedsOfLineOfCredit
Namespace Prefix: | alrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration